A picture is painted on a cardboard 8 ...

A picture is painted on a cardboard 8 cm long and 5 cm wide such that there is a margin of 1.5 cm along each of its sides. Find the total area of the margin.

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A poster of size 10 cm by 8 cm is pasted on a sheet of cardboard such that there is a margin of width 1.75 cm along each side of the poster. Find (a) The total area of the margin (b) The cost of the cardboard used at the rate of Re 0.60 per c m^2

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