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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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3 votes
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

User Paranoia
by
8.2k points

1 Answer

2 votes
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.
User Dagorym
by
7.9k points
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