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What is the area of the inside surface of the ball to the nearest cm^2 ?

What is the area of the inside surface of the ball to the nearest cm^2 ?
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1 vote
What is the area of the inside surface of the ball to the nearest cm^2 ?

What is the area of the inside surface of the ball to the nearest cm^2 ?-example-1
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User Horyun Lee
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7.9k points

1 Answer

3 votes
The inside radius of the ball is (half of 22 cm) less 0.5 cm, or 11 cm less 0.5 cm, or 10.5 cm.

The area of the inside surface of the ball is thus

A = 4*pi*r^2, which here is

A = 4*pi*(10.5 cm)^2 = 1385.4 cm^2.
answered
User Hiron
by
8.5k points
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