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QUESTION
Q
A copper wire is bent in the shape of a square of area 81 cm2. If the same wire is bent in the form of a semicircle,...
Solution
Let the side of the square = a cm
Given area of square = 81 cm2
⇒ a2 = 81
⇒ a = 9 cm
Length of the wire = perimeter of square = 4a = 4 × 9 =...
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