find the radius of a sphere whose surface area is 154cm2 (\(\pi = \frac{22}{7}\))
A
7.00cm
B
3.50cm
C
3.00cm
D
1.75cm
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
Surface area = 154cm2 (area of sphere)
4\(\pi\)r2 = 154
r\(\sqrt{\frac{154}{4\pi}}\)
= 3.50cm
Source: Myschool Past Questions Archive (Record #31246)