1.

A room 4 m × 9 m is to be carpeted leaving a margin of 5 cm form each wall. If cost of the carpet is Rs. 15 per m2, then cost of carpeting the room will be.1). Rs. 402.602). Rs. 520.653). Rs. 382.464). Rs. 573.92

Answer»

A room of DIMENSIONS 4 m × 9 m is to be CARPETED leaving a margin of 5 cm form each wall.

4 m = 400 cm and 9 m = 900 cm.

So, new length of the carpet leaving margin = 900 – 5 – 5 = 890 cm = 8.9 m

New WIDTH of the carpet leaving margin = 400 – 5 – 5 = 390 cm = 3.9 m

The area of the room to be carpeted = 8.9 × 3.9 = 34.71 m2

The cost of the carpet is Rs. 15 per m2.

So, the cost of carpeting the floor of area 34.71 m2 = 34.71 × 15 = Rs. 520.65


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