a closed box is cuboid in shape with length=40cm breadth=30cmvand height=50cm. it is made of thin metal sheet. find the cost of metal sheet required to make 20 such boxes,i 1m^2 of metal sheet costs ruppes 45.
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Area of cuboid= 2(lb+bh+hl)
= 2(1200+1500+2000)=9400cm2
=0.94 m2
cost of one box= 45×0.94=rs 42.3
cost of 20 box= 20*42.3= rs 846
= 2(1200+1500+2000)=9400cm2
=0.94 m2
cost of one box= 45×0.94=rs 42.3
cost of 20 box= 20*42.3= rs 846
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