The dimensions of a room are12.5m by 9m by 7m.There are 2 doors and 4windows in the room ,each door measures 2.5m by 1.2mand each window 1.5m by1m .find the cost of painting the walls at rupees 3.50per square metre.
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Net area that has to be paint = (total area of walls) - (area of doors) - (area of Windows)
= {2(12.5×7)+2(9×7)} -2(2.5×1.2) -4(1.5×1)
= (175+126) -6 -6
=289 m^2
hence the cost of painting the walls at rupees 3.50 per m^2 = 289×3.50 =Rs 1011.5
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I hope this helps.
= {2(12.5×7)+2(9×7)} -2(2.5×1.2) -4(1.5×1)
= (175+126) -6 -6
=289 m^2
hence the cost of painting the walls at rupees 3.50 per m^2 = 289×3.50 =Rs 1011.5
______________________________
I hope this helps.
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