Question

a plastic box 2.5 metres long 1.25 metres wide and 35 cm deep is to be mate it is open at the top ignoring the thickness of the plastic should determine the area of the sheet required for making a box the cost of sheet for it if the measuring 1 m square cost £20.50 rupees ​

Answer 1

In the above question we are said to find the cost of the paper required to cover a box open from the top and for that we are finding the curved surface area and then totaling it with the area of base and then multiplying the area with the rate of paper.

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