What is the volume of a hemisphere with a diameter of 7.7 ft, rounded to the nearest tenth of a cubic foot?

Answer 1

The volume formula for a hemisphere is:

V = 2 π r³

3

In this formula, r = radius, which is always half the diameter. Since you're given a diameter of 7.7, you can divide that by 2. Then plug into the Volume formula.

r = 7.7 ÷ 2 = 3.9

V = 2 π (3.9)³ = 2 π (59.3) = 372.4 = 124.1 ft³

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