The inner perimeter of a rectangular room is 250 m. Its height is 6 m. What is the amount to be spent to paint the walls of the room at the rate of Rs 12/- per square metre. (inclusive of doors and windows)

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Solution

The inner perimeter of a rectangular room is 250 m.

Surface area of the 4 walls =

Cost of painting an area of 1 m² = Rs.12

∴Cost of painting the area of 1500 m² =

Thus, Rs.18000 are required to paint the walls of the room.

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The inner perimeter of a rectangular room is 250 m. Its height is 6 m. What is the amount to be spent to paint the walls of the room at the rate of Rs 12/- per square metre. (inclusive of doors and windows)

The inner perimeter of a rectangular room is 250 m. Surface area of the 4 walls = Cost of painting an area of 1 m2 = Rs.12 ∴Cost of painting the area of 1500 m2 = Thus, Rs.18000 are required to paint the walls of the room.

The inner perimeter of a rectangular room is 250 m.

Surface area of the 4 walls =

Cost of painting an area of 1 m² = Rs.12

∴Cost of painting the area of 1500 m² =

Thus, Rs.18000 are required to paint the walls of the room.