Question

I need the answer for question 1 please help

Answer 1

A.
`h= (355)/(\pi r^2)`

Explanation:

Given:

Volume of cylinder =
`355 cm^3`

The volume of cylinder is given by :

`V=\pi r^2h`

where
`V` represents volume,
`r` represents radius and
`h` represents height of cylinder.

The cylinder is being redesigned by a package designer who keeps the volume constant st
`355 cm^3` and rearranges the formula to give height in terms of radius.

`\pi r^2h=355` [ Substituting
`V=355 cm^3`]

Dividing both sides by
`\pi r^2`.

`(\pi r^2h)/(\pi r^2)=(355)/(\pi r^2)\\\\h= (355)/(\pi r^2)`