Question

Rearrange the formula A = πab 4 for b.

Answer 1

The required formula is
`b=(4A)/(\pi a)` .

Explanation:

The given formula is

`A=(\pi ab)/(4)`

Multiply both sides by 4.

`A* 4=(\pi ab)/(4)* 4`

`4A=\pi ab`

Divide both sides by πa.

`(4A)/(\pi a)=(\pi ab)/(\pi a)`

`(4A)/(\pi a)=b`

Therefore required formula is
`b=(4A)/(\pi a)` .