Math Question

Question

HI,
Can someone please explain to me how to solve this problem?
1.
When a spherical balloon is filled with air, it has a diameter of 6 inches.
Which of the following gives the best estimate for the volume of air in the balloon,
in cubic inches?
A
63.6
B
108.0
C
113.1
D
150.8

1
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Answer 1

The formula for the volume of a sphere is V = 4/3 * π * r³ .

The diameter of your balloon is 6 so the radius is 3.

Now just plug it into the formula, then into your calculator and get choice c.

 

V = 4/3 * 3.14159 * 3³ = 113.09724

 

Hope this helps