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erma4kov [3.2K]
2 years ago
10

Find the radius of this circle. A = ar2 r = [?] ft A = 9aft?

Mathematics
1 answer:
Sergeu [11.5K]2 years ago
6 0

Answer:

A = \pi . r^2

If A = 9\pift^2

\pi . r^2 = 9\pift^2

r^2 = 9ft^2

r = sqrt(9ft^2)

r = 3ft ( r>0)

Step-by-step explanation:

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A cylindral drill with radius 5 cm is used to bore a hole through the center of a sphere with radius 9 cm. Find the volume of th
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The volume of the ring-shaped remaining solid is <u>1797 cm³</u>.

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The volume of a sphere of radius r units is given as (4/3)πr³.

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In the question, we are asked to find the volume of the remaining solid when a sphere of radius 9cm is drilled by a cylindrical driller of radius 5cm.

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Learn more about volumes of solids at

brainly.com/question/14565712

#SPJ4

3 0
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