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

View answer & explanation

Correct answer is B

Surface area = 154cm2 (area of sphere)

4\(\pi\)r2 = 154

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

= 3.50cm

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