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23 April, 14:06

If the surface area of a sphere is 100π cm^2, what is the radius?

a. 10 cm

b. 5 cm

c. 25 cm

d. 3 cm

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Answers (1)
  1. 23 April, 14:10
    0
    Surface area of sphere=100pi cm^2

    4pi*r^2=100 pi

    pi cancel on both sides

    4*r^2=100

    r^2=100/4

    r^2=25

    so r=5

    So option b 5 cm is correct.
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