An 80 metre long train crosses a 120 metre long platform in 20 seconds, what is the speed of the train per hour?​


ans:
Total distance= length of train + length of platform

I.e 80+120= 200 m but need in kmph so 0.2 km

Time = 20 second but need in hours so 20/(3600)= 1/(180)

Speed = distance / time = 0.2*180= 36 kmph


Answers

Answer 1
Total distance= length of train + length of platform

I.e 80+120= 200 m but need in kmph so 0.2 km

Time = 20 second but need in hours so 20/(3600)= 1/(180)

Speed = distance / time = 0.2*180= 36 kmph

Related Questions

Please please help me asp

Answers

Answer:

[tex]option \: b. \: is \: right.[/tex]

Answer:

the is 28 according to bdmass rule

Which inequality has -25 in its solution set?
y + 11 > -9
y - 17 Less-than-or-equal-to -46
30 Less-than-or-equal-to y + 5
y + 20 > -30

Answers

Answer: the first option is correct

Y+ 11> -9 this answer is most likely right.

Step-by-step explanation: -25 + 11 = 14 so that makes it bigger that -9 and that it has -25 in the solution set. Let me know if this is for Edmonton.

Answer:

It was D

Step-by-step explanation:

A reflection across the x-axis maps the point (4,-5) to the point

Answers

Answer:

(4,5)

Step-by-step explanation:

A reflection is a mirror image of the shape.

A reflection across the x-axis maps point (4,-5) to point (4. 5).

What is reflection?

A reflection is a mirror image of the shape.

After the reflection, every point in a figure is equidistant from each corresponding point in the reflected figure.

We have,

A point = (4, -5)

The point is reflected across the x-axis.

The reflection formula is given as:

Reflection across the x-axis:

(x, y) → (x, -y)

Reflection across the y-axis:

(x, y) → (-x, y)

The point (4, -5) reflected across the x-axis is:

(4, -5) → (4, - (-5)) = (4, 5)

Thus,

A reflection across the x-axis maps point (4,-5) to point (4. 5).

Learn more about reflections here:

https://brainly.com/question/15487308

#SPJ2

An outlier is often defined as a number that is more than 1.5 times the interquartile range below the first quartile or above the third quartile. Using the definition of an outlier and the given information, which of the following can be concluded?
A. The median is greater than the mean, and the distribution has only one outlier. The median is greater than the mean, and the distribution has only one outlier.
B. The median is greater than the mean, and the distribution has two outliers. The median is greater than the mean, and the distribution has two outliers.
C. The median is less than the mean, and the distribution has only one outlier. The median is less than the mean, and the distribution has only one outlier.
D. The median is less than the mean, and the distribution has two outliers.

Answers

Full question attached

Answer

Option A: the median is greater than the mean and the distribution has only one outlier

Explanation:

From the data median is definitely greater than mean as we can see from the data of siblings, median which is middle number is somewhere greater than the mean 3.5 from the question. Also from the definition of an oulier and given that the median is just one middle number in data, there is just one outlier in the data

Edgar made an initial deposit of $3200 into a deposit account, and plans to contribute an additional $175 every month. The account does not pay any interest. After how many months will he have a total of $6000?

Answers

Answer:

16

Step-by-step explanation:

How can we efficiently multiply by multiples of 10?

Answers

Answer:

just add a zero

Step-by-step explanation:

because if you do all the work it's just a waste of time when you could get the same answer by just adding a zero.

Help please.............

Answers

the answer is 2442.81 may i please get brainliest

Workout the value of 3x-4y when x=3and y=2​

Answers

Answer:

gimme your disc ill help

Step-by-step explanation:

i believe the answer would be 7

3x3 = 9
4-2 = 2
9-2 = 7

Find the roots of
25
x
2

36

A.
5, 0

B.
5, -6

C.
0, 25

D.

6
5
,
6
5

Answers

Answer:

D. 65,65

Step-by-step explanation:

I think it's A?

I'm not sure though

(b) 3(27) = 3(25 + 2)

Answers

Answer:

3(27) = 3(25 + 2) = TURE

Step-by-step explanation:

Left side: Use long multiplication:

| | 3

× | 2 | 7

Multiply 7 by the digit in the top row:

| | 3

× | 2 | 7

| 2 | 1

Multiply 2 by the digit in the top row:

| | 3

× | 2 | 7

| 2 | 1

| 6 | 0

Add:

Answer: 81

Right Hand: Simplify the following:

3 (25 + 2)

Hint: | Evaluate 25 + 2.

25 + 2 = 27:

3×27

Hint: | Multiply 3 and 27 together.

3×27 = 81:

Answer: 81

Which of the following should come next at the end of this row of letters? XOOOOXXOOOXXX:
a. oxxx, b. ooxx, c. xooo

Answers

Answer:

b

Step-by-step explanation:

The correct option that should come next at the end of this row of letters is OOXX.

What is a sequence?

A sequence can be defined as an arrangement of letters or numbers in a particular manner.

If you look at the given sequence it can be seen as the set of 5 letters where X is starting the set while O is ending the series. Also, the number of X will tend to increase in the next set as well while the number of O will be reduced. Therefore, the series can be seen as,

XOOOO  XXOOO  XXXOO  XXXXO

Thus, the correct option that should come next at the end of this row of letters is OOXX.

Learn more about Sequence:

https://brainly.com/question/21961097

please help me asap​

Answers

Answer:

53/10

Step-by-step explanation:

First do 10 time 5 to get 50 then add 3 for 53.

tl;dr: A.) [tex]\frac{53}{10}[/tex]

Hello!

A very easy way to write mixed fractions as improper fractions is to multiply the denominator and the whole number, and then add the numerator to your product. Make sure you keep the same denominator as before.

So, first you multiply.

10 · 5 = 50

Now, you add the numerator.

50 + 3 = 53

Remember to keep your denominator.

[tex]\frac{53}{10}[/tex]

Your answer is A.) [tex]\frac{53}{10}[/tex]

Hope this was helpful. Have a great day!

Given the polynomial function
f(x)=x^3-4x^2+x+6
Write the original polynomial function in factored form.
Will award brainliest

Answers

I think the answer is (x+1)(x-2)(x-3)

John earned $36 for 8 hours of work, Earnings are directly proportional with hours worked. How much did he earn when he worked 30 hours? O $135​

Answers

Answer:

he earned 135 dolars

Step-by-step explanation:

Answer:

$135

Step-by-step explanation:

first you want to find out how much he makes for 1 hour

36/8=4.5

then you multiply 4.5 by 30 because he makes $4.5 an hour and you want to find out how much money he makes when working 30 hours

Which of the following correctly describes the sum below

A. Rational
B. Both Rational and Irratiinal
C. Irrational
D. Neither rational nor irrational. T.I.A

Answers

Answer:

rational

Step-by-step explanation:

Answer:

A rational because it is

What is the slope of a line perpendicular to the line whose equation is 15x+12y=-108

Answers

Answer:

m perpendicular 1/3

Step-by-step explanation:

Have a nice evening.

A cab company charges a $3 flat rate in addition to $1.50 per mile what will represent the x axis

Answers

The answer would be y=1.5x+3.

what is 1.2983 rounded to the nearest tenth

Answers

Answer:

1.3

Step-by-step explanation:

It round up

Answer:

1.3

Step-by-step explanation:

I’m not dumb I’m just to tired to think !

Answers

Answer:

[tex]ths \: proberbility \: is \: \frac{5}{10} = \frac{1}{2} [/tex]

Answer:

ANSWER: 1/2

Step-by-step explanation:

there is 2 green and 3 yellow, 2+3=5, total of 10, so 5/10= 1/2.

Round 2,946 to the nearest thousand

Answers

Answer:

3,000

Step-by-step explanation:

Round up when the place value is greater than or equal to 5. 9>5

Answer:

3,000

Step-by-step explanation:

anytime it says round to the nearest thousand you look at the number right of the thousandth , or any number their asking about. if it is 4 and under round down. 5 and up you round up.

El lado de un rectángulo mide el tiple de su ancho, si el perímetro mide 96 cm ¿cuáles son sus dimensiones?

Answers

Answer:

Ancho 12 cm,  Largo 36 cm

Step-by-step explanation:

lamamos al ancho X y por tanto el largo será 3X

Como el perímetro es la suma de los 4 lados, tenemos la siguiente igualdad:

3X+3X+X+X=96 cm

8X=96 cm

X=96 cm/8

X=12 cm

El ancho mide 12 cm

Si el largo es el triple, entonces 3 x 12 = 36 cm

pls pls pls help if ur good with angles and sides ​

Answers

Answer:

∆PQR: Equilateral Triangle

∆PRT: Scalene Triangle

∆TQS: Isosceles Triangle

∆QNP: Right Triangle

Step-by-step explanation:

∆PQR is an Equilateral Triangle because all of its angles are equal (60°).

∆PRT is a Scalene Triangle because none of its sides are equal.

The triangle above it is equilateral, and one side length is 14, meaning all of its side lengths are 14.

This makes the top of ∆PRT 14. The hypotenuse is given and it’s 18.

The last side left is clearly shorter than both, meaning none of the sides are equal.

∆TQS is an Isosceles Triangle because 2 angles are equal.

The base angles are both 76°.

∆QNP is a Right Triangle because segment QN and PR are perpendicular, creating two 90° angles on both sides.

For number 10, I suggest using a graphing calculator or desmos to graph the points. (Or you can just add the points but I suggest graphing).

From there, you can count the length of each side.

Segment DE: 9

Segment EF: 8

Segment FD: 10

This makes ∆DEF in number 10 a Scalene Triangle because none of its sides are equal.

For number 11, I also suggest graphing the points and counting the sides.

Segment DE: 7

Segment EF: 9

Segment FD: 7

This makes ∆DEF in number 11 an Isosceles Triangle because 2 of its sides are equal.

Hope this helps! :)

if (x) = x+8 and g(x) = -4x-3, find (f+ g)(x).
A. (F+ 9)(x) = 5x +11
B. (f+9)(x) = -3x+5
C. (f+ g)(x) = 3x - 5
D. (f+ 9)(x) = -5x - 11

Answers

Answer:

Answer=B

(f+g)(x)=-3x-5

Step-by-step explanation:

f(x)=x+8.

g(x)=-4x-3.

(f+g)(x) means f(x)+g(x),So

(x+8)+(-4x-3)

(add all same terms together)

=(x+(-4x))+(8+(-3))

=-3x+5

so,

(f+g)(x)=-3x+5

Mr. Hernandez found salmon on sale at HEB for $6.99 per pound. How much would it cost if Mr. Hernandez bought 3.2 pounds of salmon? Round your answer to the nearest cents.

Answers

Answer:

$22.37

Step-by-step explanation:

Answer:

$22.37

Step-by-step explanation:

6.99(3.2)

HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

the second one would be the correct anwser i think.

Step-by-step explanation:

What is the sum of (−9x4+6x3+2x5+6) and (3x5+3x4+7x3+8)?

Answers

Answer:

(−9x4+6x3+2x5+6)

(3x5+3x4+7x3+8)

Step-by-step explanation:

The answer to (−9x4+6x3+2x5+6)  is -2

and the answer to (3x5+3x4+7x3+8) Is 56

Solve.
x^2 + 4 = 0.

Answers

Answer:

No real solutions

Step-by-step explanation:

You use the quadratic formula.

x = −b ± √(b^2 − 4ac)/2a where y = ax^2 + bx + c

b is 0, a is 1, and c is 4.

-0 ± √(0^2 − 4 x 1 x 4)/ 2(1)

±√(-16)/2

Split √(-16) into √(16) and √(-1).

Now, i = √-1

So you get ±√(-16) = ±4i.

The original equation was ±√(-16)/2.

±4i / 2 = ±2i

The answer is x = ±2i

(Note: ± means positive or negative)

does anyone know how to do the work these out? thank you!! ☺️

Answers

I figured it out but I can’t show the picture but I know the answer it’s D

Please help easy question

Answers

The Answer:

63° degrees

Answer:

63° degrees

Step-by-step explanation:


Mary has 24 pounds of sugar and is going to separate it into , pound bags for the students in her class. How many bags of sugar will she have?

Answers

Answer:

24?

Step-by-step explanation:

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