A wire is in the form of a square of side 49.5 cm.It is straightened and bent into a semi circle.What is the radius of semi circle so formed?
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15.76 cms as circumference (c) = 2 x π x radius (r) i.e., r = c/2 x π means r = 2 sides of a square (49.5 x 2) divided by 2 π
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Answer:38.5
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