Question

The formulae for finding the surface area of a sphere os given by A=4 pi Rsquared. calculate the radius of the sphere whose surface area is 616cm2. take pi 22/7

please help me...​

Answer 1

Answer: 7cm

Step-by-step explanation:

The surface area of a sphere is calculated by using the formula:

A = 4πr²

Since the surface area is 616cm², using the formula given, the radius will be calculated thus:

A = 4πr²

616 = 4 × 22/7 × r²

616 = 88/7 × r²

Multiply both side by 7/88

616 × 7/88 = 88/7 × 7/88 × r²

49 = r²

r = ✓49

r = 7

The radius is 7cm