Question
The perimeter of a rectangle is equal to that of a square.
If the rectangle's length is 22 cm and its breadth is 13 cm, what is the circumference of a semicircle whose radius equals the squareโs side?Solution
ATQ,
Perimeter of the rectangle = 2(22 + 13) = 2 ร 35 = 70 cm
Perimeter of the square = 4 ร side
70 = 4 ร side
Side of square = 17.5 cm
Radius = 17.5 cm
Circumference = ฯr + 2r = (22/7) ร 17.5 + 2 ร 17.5 = 385/7 + 35 = 55 + 35 = 90 cm
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