Question

find the radius of a sphere whose surface area is 153 cm sq.

Answer 1

Answer:

3.5cm

Step-by-step explanation:

Let x be radius 

⇒Surface Area =154cm2

∴4πx2=154

⇒x2=4×22154×7=449

⇒x=449 x=3.5cm

Answer 2

Step-by-step explanation:

Surface area of sphere = 4pir^2

Radius= r

SA = 153 cm sq

153 = 4 pi r^2

153/4×7/22 = r^2

12.17 = r^2

3.48 = r