Question
What is the difference between (in m2) the
area of a circular field of radius 21 metres and area of a rectangular piece of land having its dimensions as 20 metres × 30 metres?Solution
Area of the circular field = π × radius2 = (22/7) × 21 × 21 = 1386 m2 Area of the rectangular piece of land = length × breadth = 20 × 30 = 600 m2 So, difference in area = 1386 – 600 = 786 m2
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