Question

My brother is struggling with this maths question.

Make r the subject of the formula: V = π r² h

Please could somebody help? Thanks in advance :D

Answer 1

r =
`√(V/ pi * h)`

Explanation:

V = π r² h

Bring the π and h to the left by diving both sides of the equation by π h

V ÷ (π h) =
`r^(2)`

Take the square root of both sides

r =
`√(V/ pi * h)`