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find the radius of a sphere whose surface area is 154cm2 ((pi = frac{22}{7}))

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 Answer: Option B
Explanation

Surface area = 154cm2 (area of sphere)
4(pi)r2 = 154
r(sqrt{frac{154}{4pi}})
= 3.50cm

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