Question

The area of acircle is to area of a rectangle with sides 112 m and 88 m respectively. Find the cirumference of the circle

Answer 1

Area of the rectangle:
l×b
=112 × 88
=9856.

Circle:
Radius = ?
Area= πr×r
=22÷7 × r × r
=9856

therefore r×r = (9856 × 7) ÷22
=68992 ÷ 22
= 3136.

therefore r×r = 3136
r= √3136
=56

circumference of a Circle = 2πr
= 2×22÷7×56
cancel 7 and 56
so, answer comes as 2×22×8= 44×8
= 352 units.


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