Q a biscuit laid into a rectangular tray of length 2.5m and breadth 1m out of this 1000 biscuits of radii 2.8cm each are cut out from a circular disc .how much area of ring is left wasted .
Q a biscuit laid into a rectangular tray of length 2.5m and breadth 1m out of this 1000 biscuits of radii 2.8cm each are cut out from a circular disc .how much area of ring is left wasted .