Question

Find the circumference of a circle whose area is 49πcm^2

Answer 1

14π

Explanation:

→ State the area formula

π × r² = 49 π cm²

→ Solve by dividing both sides by π

r² = 49

→ Square root both sides

r = 7

→ Substitute into circumference formula

2 × π × r ⇔ 2 × π × 7 ⇔ 14π