SOLUTION: A closed box is cuboid in shape with length 40 cm breadth 30 cm and height 50cm it is made of thin metal sheet. Find the cost metal sheet required to make 20 such boxes, if 1 mete

Question 983958: A closed box is cuboid in shape with length 40 cm breadth 30 cm and height 50cm it is made of thin metal sheet. Find the cost metal sheet required to make 20 such boxes, if 1 meter square of the metal- sheet cost of rupees 45
Answer by Cromlix(4381) (Show Source): You can put this solution on YOUR website!
Hi there,
First consider each of the six faces.
2 x 30cm x 40cm (top and bottom faces)
= 2400cm^2
2x 30cm x 50cm (Each end)
= 3000cm^2
2x 40cm x 50cm (2 sides)
= 4000cm^2
Total =
2400+3000+4000
9,400cm^2
9,400cm^2 = 0.94m^2
20 boxes =
20 x 0.94 = 18.8m^2
18.8m^2 x 45 rupees
= 846 rupees.
Hope this helps:-)
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