Question
When a sphere has a volume of 972π, the radius of the sphere is ______________.
- 9
- 7
- 18
- 21
Hint:
Use the formula of volume of sphere.
The correct answer is: 9
given that:
volume of sphere = 972π
To find:
radius of the sphere =?
Solution:
We have to find the radius of the sphere whose volume is given which is 972π.
We can find the radius of sphere using formula of volume of sphere
V =
πr3
Put the given values is above formula
972π =
πr3
972
= r3
729 = r3
r = 7
The radius of the sphere is 7.
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