from a rectangular piece of metal sheet of length and breadth 1.60 m and 80 cm respectively 3 circular sheets of 20 cm radius are cut out what area of metal is left
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area of metal left = area of metal (rectangle ) - 3× area of circular sheet
=160 × 80 - 3 π(20)^2
=12800 - 1200π
= 12800 -3768
=9032 cm^2
=160 × 80 - 3 π(20)^2
=12800 - 1200π
= 12800 -3768
=9032 cm^2
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