A room is 6.2m long,3.8m wide and 3.2m high it has 2 doors each 2m x 1.2m and 2 window each 1.2 m x 1.5m.find the cost of white-washing its wall at the rate of ruppes 10 per squad meter
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2 doors = 2×2×1.2 = 4.8m^2
4 window = 2×1.2×1.5 = 3.6m^2
therefore = 2(l+b)h
= 2 (6.2 +3.8)×3.2
= 64m^2
= 64( 4.8+3.6)
= 55.6m2
cost is 55.6×10 = 556 rupees
hope it will help u
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