Question

find the approximate surface area of a bowling ball with a raius of 5 inches

Answer 1

The surface area would be 100 pi, or rounded to 314.159.

Answer 2

Formula for the surface area of a sphere:  SA  =  4·π·r2

Formula for the volume of a sphere:  V  =  (4/3)·π·r3

Surface area to volume ratio: ( 4·π·r2 ) / ( (4/3)·π·r3 )  =  3 / r

Radius = 5   --->   3/5