The diagram below shows a rectangular sheet of cardboard with 2 circular pieces cut from it. The radius of each of the circular pieces

The diagram below shows a rectangular sheet of cardboard with 2 circular
pieces cut from it. The radius of each of the circular pieces is 3cm. Find the
area of remaining card.

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  1. Answer:

    Two sector of 90 degree cut out(90*2=180 degree) means semicircle

    perimeter of circle= 2πr

    = 2*22/7*3=18.85 cm

    perimeter of semicircle=18.85/2=9.42 cm approx

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