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John wants to put a metal ring around a circular table that he has bought , he knows the area of the circle is 201cm^2, how long a piece of metal does he need?
Guest Mar 12, 2012
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A=pi*r^2
U=2*pi*r

r=sqrt(A/pi)

[input]sqrt(201/pi)[/input]
r=7.99876785029682

U=2*pi*r=2*pi*7.99876785029682
[input]2*pi*7.99876785029682[/input]
U=50.2577406325254255508
admin  Mar 13, 2012

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