Question

A plastic box 1.5 m long, 1.25 m wide and 65 cm deep is to be made. It is opened at the
top. Ignoring the thickness of the plastic sheet, determine:
1) The area of the sheet required for making the box.
(2) The cost of sheet for it, if a sheet measuring 1m² costs € 20.​

Answer 1

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Answer 2

1)We have , Length-1.5m

Breadth-1.25m

and Depth =Height.

1)Since the plastic box is open at the top.Therefore,

Plastic sheet required for making such a box

=[2(l+B)×h+lb]m^2

=[2×2.75+.65+1.875]m^2

=(3.575+1.875)m^2

=5.45m^2

2)Cost of 1 m square of sheet =Rs20

Total cost of 5.45 m square =Rs (5.45×20)

=₹109