Question

A cone has a diameter of 4 centimeters and a height that is 8 times the diameter. Using 3.14 for pi, which of the following can be used to calculate the volume of the cone? (6 points)

Answer 1

I dont see the options

Answer 2

one over three (3.14)(32cm)2(4cm)
one over three (3.14)(32cm)2(8cm)
one over three (3.14)(4cm)2(32cm)
one over three (3.14)(2cm)2(32cm)

Answer 3

do you know formula for volume of a cone ?

Answer 4

no

Answer 5

The formula for the volume of a cone is V=1/3hπr².

Answer 6

V = area of base time height divide 3

Answer 7

area of base = ?

Answer 8

idk im sorry

Answer 9

area of base = area of a circle
the radius of this circle = diameter /2
diameter = 4 cm

Answer 10

would it be A?

Answer 11

No

Look at the information they gave you

Diameter = 4
Height is 8 times the diameter so 8*4 = ??

You need to know the formula for the volume of a cone

\(\text{Volume} = \dfrac{1}{3} \pi r^2 h\)

\(\pi\) or pi is 3.14

r is the radius of the base of the cone

Remember that radius = 1/2 * diameter
The radius is half of the diameter.
So if the diameter is 4, what is the radius??

And h is height

Put all the numbers you get into the formula

Answer 12

so its C?

Answer 13

If the diameter is 4

Then what is the radius?

radius = 1/2 * diameter

Answer 14

What is half of 4?

Answer 15

2

Answer 16

So your radius is 2

The formula for volume has RADIUS not diameter

So can you replace r with 2

What's your final answer?

Answer 17

1/3 (3.14)(2cm)2(32cm)

Answer 18

That is correct

Answer 19

thank you so much

Answer 20

You're welcome!