Mensurationmedium · Past Paper
A room is 10 m long, 8 m wide and 4 m high. Find the cost of painting its four walls at Rs. 10 per sq. m.
ARs. 1440
BRs. 1600
CRs. 1200
DRs. 2880
✓ Correct Answer: A — Rs. 1440
Area of 4 walls = 2h(l+b) = 2*4(10+8) = 8*18 = 144 m². Cost = 144 * 10 = Rs. 1440.
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