The cost of plastering the 4 walls of a room which is 4m high and brea

1.	The cost of plastering the 4 walls of a room which is 4m high and breadth one third of its length is Rs. 640 at the rate of Rs. 5/m². What will be the cost of carpeting its floor at the rate of Rs. 250/m².
Answer» Step-by-step explanation: The area of the 4 WALLS is then 3x^2 + 3X^2 + 3X^2/2 +3X^2/2 = 9X^2 If the cost of PLASTERING is R5/sq m, then 9X^2 × 5 = 720 Solving this gives X = 4 m - a RATHER HIGH ceiling The floor area is then (3×4) × (3×4/2) = 72 sq m Carpeting is then 250×72 = R18000

The cost of plastering the 4 walls of a room which is 4m high and breadth one third of its length is Rs. 640 at the rate of Rs. 5/m². What will be the cost of carpeting its floor at the rate of Rs. 250/m².

Answer»

Step-by-step explanation:

The area of the 4 WALLS is then 3x^2 + 3X^2 + 3X^2/2 +3X^2/2 = 9X^2

If the cost of PLASTERING is R5/sq m, then 9X^2 × 5 = 720

Solving this gives X = 4 m - a RATHER HIGH ceiling

The floor area is then (3×4) × (3×4/2) = 72 sq m

Carpeting is then 250×72 = R18000

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The cost of plastering the 4 walls of a room which is 4m high and breadth one third of its length is Rs. 640 at the rate of Rs. 5/m². What will be the cost of carpeting its floor at the rate of Rs. 250/m².

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