If a person can run along the perimeter of an equilateral triangle in 63 minutes, then in how many minutes can he run along the circle which circumscribes the mentioned triangle?
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let the sides of eq triangle =x cm
perimeter =sum of sides
=x+x+x=3xcm
3x=63
x=21
side=21
radius is half of side or diameter=21/2
now insert it in formula of circumstances of circle
perimeter =sum of sides
=x+x+x=3xcm
3x=63
x=21
side=21
radius is half of side or diameter=21/2
now insert it in formula of circumstances of circle
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