If S=4πr² , find i) the value of S when r = 10

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Colin Hebert asked Oct 16, 2022

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39 votes

If S=4πr² , find
i) the value of S when r = 10

Mathematics
high-school

Colin Hebert asked Oct 16, 2022

by Colin Hebert

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2 Answers

19 votes

Answer:

400pi, or 1256.637...

Explanation:

S = 4pir^2

S = 4pi(10^2)

S = 4pi(100)

S = 400pi

Ganesh Nemade answered Oct 16, 2022

by Ganesh Nemade

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22 votes

Answer:

S = 1256

Explanation:

S = 4
$\pi$
r^2

S = 4
$\pi$
(10)^2

S = 4
$\pi$
(100)

S =
4(314)

S = 1256

Denis Barmenkov answered Oct 21, 2022

by Denis Barmenkov

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