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MissTica
2 years ago
11

The volume of a cylinder is 540 pi ft^3 the height is 15 ft. what is the diameter

Mathematics
2 answers:
tankabanditka [31]2 years ago
8 0

Answer:

b. 12

Step-by-step explanation:

The volume of a cylinder is

\pi {r}^{2} h

Let us compose an equality and solve for the radius.

540pi = pi × r^2 × 15.

Divide both sides of the equation by 15pi.

r^2 = 36

r = +/- 6.

Length cannot be negative, so r = 6.

diameter = 2 × r. In this case,

d = 2 × 6 = 12.

The diameter is 12 ft.

jek_recluse [69]2 years ago
6 0

Answer:

12

Step-by-step explanation:

Volume of cylinder is pi*r^2*h    (this is equal to 540pi in this case)

So we have 540pi=pi*r^2*h  

this means that 540=r^2*h   (I just divided both sides by pi since both sides were being multiplied by pi)

The height,h, is 15 so plug in 540=r^2*15

Divide both sides by 15 giving 540/15=r^2

So r^2=36

So r=6

The diameter,d, is twice the radius, r.

So d=2(6)=12

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