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side of squaresheet = 12 cm
area of circle =
r2
3.14 × 4 ×4 =16 × 3.14
area of squaresheet = (side)square
(12) whole square
144cm2
144 - 50.24
=93.76cm2
1cm2 = rs.8
93.76 cm2 = 8×93.76 = 750.08
rs.750
cost of circle = 50 × 8 = rs.400
hence total cost = 750 + 400
=1150
almost we can write that shortly 144×8 =1152 ans.