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The great circle of a hemisphere has a circumference of 22π square meters. What is the radius of the hemisphere?
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The great circle of a hemisphere has a circumference of 22π square meters. What is the radius of the hemisphere?

User Theprof
by
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2 Answers

2 votes
I think the great circle is the bottom circle thing where it got cut off
so c=2pir
so given
c=22pi

22pi=2pir
divide both sides by pi
22=2r
divide both sides by 2
11=r
the radius is 11 meters
User Sravan Ganji
by
7.5k points
2 votes
Let's assume π is 3.14.
22 * 3.14 ≈ 69.08
Circumference = π*diameter
69.08÷3.14
22 is the diameter.
Diameter / 2 = radius
Radius ≈ 11 square meters
User Comet
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7.6k points
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