Question

Please someone hurry and answer this please!

Answer 1

`{\boxed{\sf{ b= (4A)/(\pi a)}}}`

Explanation:

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

we can solve for b using cross multiplication,

`\sf \pi ab = 4A`

Now to solve for b, Divide both the sides by πa,

`\sf \frac {\pi ab }{ \pi a} = (4A)/(\pi a)`

`\sf { b= (4A)/(\pi a)}`

Therefore, Option B is the answer.