Answers

2016-03-18T14:09:27+05:30
L=40
b=28
 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
                                  =3.14*200
                                    =628 cm²
area of remainning part= area of  sheet -area of semicircle
                                     1120-628
                                         =492cm²
so the remanning area is 492 cm²
                                 
1 3 1
plz mark as brainest
bc is not 40
draw and see for ur self
no