Question

A hollow sphere in which a circus motor cyclist performs his stunts, has an area of 154 m^2 avilable to him for riding. Find the inner radius.
A) 7 m
B) 3.5 m
C) 4 m
D) 6 m
(please step by step explanation)

Answer 1

Step-by-step explanation:

Given that : area of hollow sphere=154 m^2

1. To find: radius of sphere

Solution :

$area \: of \: hollow \: sphere = 2\pi {r}^{2}$

154 =2×22/7×r^2

154= 44/7×r^2

r^2 =154×7/44

=12.25

r =3.5 m