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What is the area of the inside surface of the ball to the nearest cm^2 ?
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Oct 23, 2019
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What is the area of the inside surface of the ball to the nearest cm^2 ?
Mathematics
middle-school
Horyun Lee
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Horyun Lee
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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.
Hiron
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Oct 27, 2019
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Hiron
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