find the radius of circle whose area is 1386cm^2
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Answered by
3
Area of circle = pi*r*r
1386=22/7*r^2
1386*7/22=r^2
63*7=r^2
root of 441=r
21 cm is the radius
1386=22/7*r^2
1386*7/22=r^2
63*7=r^2
root of 441=r
21 cm is the radius
Answered by
7
Area of circle= pi *r^2
given:
A= 1386 cm^2
WKT, pi = 22/7
=) 22/7 *r^2 = 1386
=) r^2 = 1386 *7/22
=) r^2 = 63*7
=) r^2 = 441
=) r^2 = Sq.root of 441
=) r= 21
therefore radius = 21 cm
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