luisvillasenor1 luisvillasenor1

06-03-2017
Mathematics

contestada

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

Respuesta :

H1a2r3s4h5 H1a2r3s4h5

06-03-2017

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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