Question

A cuboidal tin of 30*40*50 cm find the cost of tin required for making 20 such tins if the cost of sheet os rs 20 per meter

Answer 1

TSA of cuboid=2(lb+bh+hl)

=2(30*40+40*50+50*30)

=2(4700) =9400cm^2

Surface area of 20 such tins=20*9400=188000cm^2

Converting cm^2 to m^2=100cm*100cm=1m^2

188000/100*100 18.8m^2

Cost of making tin sheet=rs 20

Cost of making 20 such tin sheets=20*18.8 =Rs 376