Question

The surface area of a sphere is 1386cmthe total surface area of a sphere is 1386 CM square find the radius of the sphere ​

Answer 1

Answer:

10.5cm

by

Step-by-step explanation:

4pir2=1386

4*22/7*R2=1386

R2=1386*7/22*4

R2=110.25cm

r=10.5cm

Answer 2

T.S.A of sphere is 4πr2

$4\pi {r}^{2} = 1386 \\ {r}^{2} = 1386 \times 7 \div 4 \times 22 \\ {r}^{2} = 53361 \\ r = \sqrt{53361} \\ r = 231$