Question

Help pls so people say it’s none of these but idk I am confused.

Answer 1

Volume =
`\pi r^2 h`

2512 = 3.14 × r^2 × 8

`r^2 = \displaystyle(314)/(3.14)`

`r^2 = 100`

`r = 10 \ cm`

`Diameter = 2r = 20 \ cm`

Dont get confused try to understand : )

Answer 2

20 cm

Explanation:

The volume of a cylinder is given by

V = pi r^2 h

We are given the volume and the height

2512 = pi r^2 *8

Divide each side by 8

2512/8 = pi r^2 *8/8

314 = pi r^2

Divide each side by pi

314/3.14 = 3.14 r^2 /3.14

100 = r^2

Take the square root of each side

sqrt(100) = sqrt(r^2)

10 = r

We want to find the diameter

d =2r

d =2(10)

d =20

The diameter is 20 cm