The edge of a cubical room is 3 m. The inner walls are to be painted (inclusive of windows and doors). Find the expenditure to be incurred at the rate of Rs 15/- per square metre.

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Solution

Total surface area of the inner walls of the cubical room:

Cost of painting per 1 m² of area = Rs.15

∴Amount required for painting the inner walls =

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The edge of a cubical room is 3 m. The inner walls are to be painted (inclusive of windows and doors). Find the expenditure to be incurred at the rate of Rs 15/- per square metre.

Total surface area of the inner walls of the cubical room: Cost of painting per 1 m2 of area = Rs.15 ∴Amount required for painting the inner walls =

Total surface area of the inner walls of the cubical room:

Cost of painting per 1 m² of area = Rs.15

∴Amount required for painting the inner walls =