A closed box is cuboid in shape with
length = 40 cm, breadth = 30 cm and
height = 50 cm. It is made of thin metal
sheet. Find the cost of metal sheet required
to make 20 such boxes, if 1 m² of metal sheet
costs 45ruppees .
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As the box is in cuboidal in shape so sheet required to make one box is equal to the total surface area of cuboid
I hope you understand
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