The parameter of a square is equal to the perimeter of a rectangle of length 20 cm and breadth 16 cm. Find the circumference of a semicircle whose diameter is equal to the side of the square. (Round off your answer to two decimal places)?  Choose the correct choice from the following choices:  A) 28.28CM  B) 25.45CM  C) 26.45CM  D) 20.18CM  E) 32.14CM
Let the side of the square be a cm.   Parameter of the rectangle = 2(20 + 16) = 72 cm Parameter of the square = 72 cm   i.e. 4a = 72   28.28CM = 18   Diameter of the semicircle = 18 cm   Circimference of the semicircle   = 1/2(∏)(18)   = 1/2(22/7)(18) = 396/14 = 28.28 cm to two decimal places   28.28CMnswer: 28.28CM
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The parameter of a square is equal to the perimeter of a rectangle of length 20 cm and breadth 16 cm. Find the circumference of a semicircle whose diameter is equal to the side of the square. (Round off your answer to two decimal places)?