while marking a mask riya removed two circles of radius 7cm and a rectangle of length 4cm and breadth 1cm from a circular card of radius 42cm . find the area of remaining card
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Area of remaining card
=Area of card - area of two removed circles- area of removed rectangle
= (4/3*22/7*42³)- ( 2*4/3*22/7*7³) - (4*1)
=310464 - 2874.67 - 4
= 307585.33
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