A cone has radius 3 and height 4. Your classmate calculates its surface area as shown:
Explain your classmate's error.
S. A. = pi(5)^2 + pi(3)^2 = 25pi + 9pi = 3pi
Answers
Answer:
Lateral surface area of cone = π(3)(5)
Lateral surface area of cone = 47.1 unit² (Approx.)
Step-by-step explanation:
Given:
Radius of cone = 3 unit
Height of cone = 4 unit
Find:
Lateral surface area of cone
Computation:
Slant height of cone = √Radius² + Height²
Slant height of cone = √3² + 4²
Slant height of cone = √9 + 16
Slant height of cone = √25
Slant height of cone = 5 unit
Lateral surface area of cone = πrl
Lateral surface area of cone = π(3)(5)
Lateral surface area of cone = (3.14)(15)
Lateral surface area of cone = 47.1 unit² (Approx.)
Related Questions
find a fraction or mixed number equivalent to each decimal.
13. 0.3333...
14. 0.050505...
15. 0.454545...
16. 0.045045...
17. 10.121212...
18. 3.9999...
Please help me asap
Answers
Answer:
13. 1/3
14. 1/20
15. 9/20
16. 9/200
17. 253/25
18. 39/10
Find the perimeter of the figure to the nearest hundredth.
Answers
Answer: 90.75 mm
Step-by-step explanation:
Given
The radius of the hemisphere is 16 mm
length of the inclined sides are 20 mm
The perimeter of the figure is the sum of the length of two inclined sides and a semi-circle circumference
[tex]\Rightarrow \text{Perimeter P=}\dfrac{2\pi r}{2}+2\times 20\\\\\Rightarrow P=\pi \times 16+40\\\Rightarrow P=50.75+40\\\Rightarrow P=90.75\ mm[/tex]
What is the sum of all interior angles of a regular hexagon? A. 120° B. 360° C. 540° D. 720°
Answers
because 120x6 =720
The volume of a rectangular prism is 48 cubic centimeters. The volume of a similar rectangular prism is 6 cubic centimeters.
What is the scale factor for the rectangle?
a. 8
c. 4
b. 6
d. 2
Answers
imagine paying attention in class
Answers
?200 <?
O 11 and 12
0 12 and 13
O 13 and 14
0 14 and 15
Answers
Answer: 14 and 15
Step-by-step explanation:
The square root of 200 is 14.1421356237.
14< 14.1421356237 < 15
Preform the indecated operation 1/3x6/7
Answers
Answer:
0.257
Step-by-step explanation:
What is the value of the expression 6 3/4 ( - 11.5) ? Explain why your answer is positive or negative.
Answers
Answer:
-77.625
Step-by-step explanation:
Covert 6 3/4 Mix it with decimal Which is 6.75,
then calculate Times this 6.75 by (-11.5). and we will get
- 77.625 ( Answer)
Help I need the answer dont send NO FILE only answer if you know it step by step explanation
Answers
Step-by-step explanation:
B (-8,-6)
C (-10, -6)
D (-10,2)
E (-8,2)
28/10 simplify fraction
Answers
A bin of winter hats on clearance contains 6 green caps, 7 blue caps, and 9 red caps If you pick one without looking, what is the total number of outcomes? Answer: 1 Part B What is the probability that the cap will be green?
Answers
Answer:
Since it is the case of independent the answer will be 6/22
What is the measure, in degrees, of angle x?
Answers
Answer:
121°
Step-by-step explanation:
they're basically the same
Answer:
121°
Step-by-step explanation:
Theorem of vertical angles state that the opposite angles formed by two intersecting lines are congruent.
If my answer is incorrect, pls correct me!
If you like my answer and explanation, mark me as brainliest!
-Chetan K
Which number could be included in Group B
Answers
Answer:
C
Step-by-step explanation:
Just did the test
GIVING BRAINLIEST -23 points-
URGENT HELP ME PLEASE!!!
Answers
Answer:
See a sides are equal so your answer is 8.2 in.
Please help! I don’t really understand
Answers
Sam's Office Supply store has 436 pens.Sam orders 6 pens each in 8 different colors to add to his store. How many pens did Sam order?
Answers
Answer:
48 pens
Step-by-step explanation:
6 times 8 is 48,
sam ordered 48 pens
what is f(-1) for the function given?
f(x)=x^2-3x+8
Answers
Answer: 12
Work is provided in the image I attached
Item 7
Michael arrives at the basketball court at 5:52 p.m. He plays basketball for 1 hour 12 minutes.
What time does Michael stop playing basketball?
6:04 p.m.
7:02 p.m.
7:04 p.m.
7:12 p.m.
Answers
Answer:
he stops playing at 7:04
Step-by-step explanation:
Which equation describes the relationship shown in the table?
Items Sold
A- p=2i
B- i=2p
C- p=i+5
D- i=p+5
Answers
Answer:
A
Step-by-step explanation:
i = items sold
p = profit
Based on the table, the profit is twice the number of items sold. Therefore the answer is A. Correct me if I'm wrong. I hope it helps.
who is correct
please answer ASAP!!! pls (:
Answers
Answer:Dwight is correct
Step-by-step explanation:
|Calculate the midpoint (-5,5), K(-3,-2)
Answers
Answer:
(-4,1.5)
Step-by-step explanation:
Given :-
Two points (-5,5) and (-3,-2)And we need to find out the midpoint of the two points. The midpoint of two points is given by the ,
[tex]:\implies[/tex] Midpoint =( x1+x2/2 , y1+y2/2)
[tex]:\implies[/tex] Midpoint =( -5-3/2 , 5-2/2)
[tex]:\implies[/tex] Midpoint =(-8/2,3/2)
[tex]:\implies[/tex] Midpoint = (-4 , 1.5)
Hence the midpoint of the two points is (-4,1.5) .Here we would be using the midpoint formula to find the co-ordinates of the line segment joining the two given points.
Given points,
(-5,5) and (-3,-2)
★ Midpoint of two points:-
[tex]\boxed{ \sf{M \: = \: \dfrac{x_1 \: + \: x_2 }{2} \: , \: \dfrac{y_1 \: + \: y_2 }{2}}} \: \pink\bigstar[/tex]
★ We have :
x1 = -5 y1 = 5 x2= -3 y2 = -2★ Putting the values :
Refer the attachment.Additional Information :★ Centroid of a triangle :-
[tex]\boxed{ \sf{Centroid \: = \: \dfrac{x_1 \: + \: x_2 \: + \: x_3}{3} }} \: \pink\bigstar[/tex]★ Distance Formula :-
[tex]\huge \large \boxed{\sf{{d \: = \: \sqrt{(x _{2} - x _{1}) {}^{2} \: + \: (y _{2} - y _{1}) {}^{2} }}}} \: \red\bigstar[/tex]
Please help quickly!!!! I will give brainiest
Answers
Answer:
A
Step-by-step explanation:
10% raise in $20 is $2, so its only $2 more, so each hour she would earn $2 more.
Option D is the answer. $200
A holiday park is digging a swimming pool.
The volume of earth to be removed is 120m^3.
A mechanical digger can remove 0.15m^3 of earth with each scoop.
a) How many scoops will be needed to remove all the earth?
Please it’s urgent!
Answers
Hope this helps:)
What is the area of this triangle? I need help!! pleaseee
Answers
Answer:72
Step-by-step explanation: 9x8 =72
El valor numérico de la expresión 〖P(y)=y〗^2-7y+10 para y=2 es: a. P(2)=9 b. P(2)=0 c. P(2)=-2 d. P(2)=-5
Answers
Answer:
Opción b, P(2) = 0
Step-by-step explanation:
Tenemos la expresión:
P(y) = y^2 - 7*y + 10
Para encontrar el valor P(2), simplemente debemos remplazar todas las "y" en la expresión de arriba por el valor 2, asi obtenemos:
P(2) = 2^2 - 7*2 + 10 = 4 - 14 + 10 = (4 - 14) + 10 = -10 + 10 = 0
P(2) = 0
La opción correcta es b.
Drag a company name into each box to show the total cost from least to greatest.
Answers
Answer:
Company A:
150 x 3 = $450
6/100 x 150 = $9
450 + 9 = $459
Company B:
3.10 x 150 = 465
4/100 x 150 = 6
465 + 6 = $471
Company C:
3.20 x 150 = $480
Now the order (Answer):
A(459), B(471), C(480)
What is the diameter of a cone with height 8 m and volume 150 pi m3 ?
A. 7.5 m
B. 5V3 m
o C. 7.573 m
D. 15 m
Answers
Answer:
V = pi*r^2*h
V = 150 m^3
h = 8 m
150 = pi*r^2*8
Solve for r (the radius) then multiply by 2 to obtain the diameter.Only, this is a cone, not a cylinder.
V = 1/3 pi r^2 h
Diameter of the cone is 15 m. So, option D is correct.
What is meant by solid shape ?Solid shapes are defined as the three-dimensional objects that are described by the three dimensions length, breadth and height.
Here,
Volume of the cone is given by,
V = 150[tex]\pi[/tex] m³
Height of the cone, h = 8 m
We know, the equation for the volume of a cone is,
V = 1/3[tex]\pi[/tex]r²h
where r is the radius and h is the height of the cone.
So,
(1/3) [tex]\pi[/tex]r²h = 150[tex]\pi[/tex]
r²x 8 = 3 x 150 = 450
r² = 450/8
r² = 56.25
r = 7.5 m
Therefore, diameter of the cone,
d = 2r
d = 2 x 7.5
d = 15 m
Hence,
Diameter of the cone is 15 m.
To learn more about solid shapes, click:
https://brainly.com/question/22731242
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Helpppppppppppppppppp
Pppppo
Answers
Answer:
(2 * L)+(2 * W)
Step-by-step explanation:
Need answer for only number 15! please help!
Answers
Explain
Ram is 20 years older than Sam. In 5 years, Ram will be twice old as Sam .Find their present ages.
Answers
Answer:
Sam is 15 years old and Ram is 35.
in five years Sam will be 20 and Ram will be 40, which is twice as old in age.