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From a rectangular sheet of paper abcd with ab=40cm and ad=28cm a semicircular portion with bc as diameter is cut off find the area of the remaining paper



 area of sheet =l*b 
so te area of sheet is  l*b
area of sheet is 1120cm²
BC=40 cm
diameter of semicircle r=20
Area of semicircle =pir²/2
                              =pi (20)²/2
                               =pi 200
                                    =628 cm²
area of remainning part= area of  sheet -area of semicircle
so the remanning area is 492 cm²
1 3 1
plz mark as brainest
bc is not 40
draw and see for ur self
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