A wire in the shape of a rectangle of length 18 cm and 15 cm is reshaped and bent in the form of a circle. Find the radius and area of the circle
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The perimeter of the rectangle is
P=2(l+b)
=2(18+15)
=66 cm
The circumference of the circle should also be 66 cm
Circumference = 2 * 22/7 * r
66 = 2 * 22/7 * r
r = 66/2 * 7/22
r = 10.5 cm
Area = 22/7 * r^2
= 22/7 * 10.5^2
= 22/7 * 110.25
= 346.36 cm (approx.)
P=2(l+b)
=2(18+15)
=66 cm
The circumference of the circle should also be 66 cm
Circumference = 2 * 22/7 * r
66 = 2 * 22/7 * r
r = 66/2 * 7/22
r = 10.5 cm
Area = 22/7 * r^2
= 22/7 * 10.5^2
= 22/7 * 110.25
= 346.36 cm (approx.)
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