JAMB - Mathematics (1993 - No. 27)

find the radius of a sphere whose surface area is 154cm2 (\(\pi = \frac{22}{7}\))
7.00cm
3.50cm
3.00cm
1.75cm

Explanation

Surface area = 154cm2 (area of sphere)

4\(\pi\)r2 = 154

r\(\sqrt{\frac{154}{4\pi}}\)

= 3.50cm

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