Question

find the radius of sphere if its area is 154 cm square

Answer 1

Step-by-step explanation:

Total surface area of the sphere=4πr square

Total surface area of the sphere =4×22/7×r×r

154=4*22/7*r*r

r*r=154*7/4*22

r square=49/4

radius=√49/4

radius=7/2=3.5 cm