find the radius of a sphere whose surface area ... - JAMB Mathematics 1993 Question
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
correct option: b
Surface area = 154cm2 (area of sphere)
4\(\pi\)r2 = 154
r\(\sqrt{\frac{154}{4\pi}}\)
= 3.50cm
4\(\pi\)r2 = 154
r\(\sqrt{\frac{154}{4\pi}}\)
= 3.50cm
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