a room is 10 metres long 5 metre broad and 12 metre height find the cost of whitewashing all four walls is the cost of whitewashing is rupees 7 per metre square what will be the cost of whitewashing the ceiling of the room is also whitewashed
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the room is in the shape of a cuboid and it's four walls are its lateral surfaces
LSA of cuboid = 2×h ( l + b )
2×12 ( 10 +5 )
24 × 15
= 360 m2
cost 7× 360
2520
and the cost of whitewashing the celling
area = l×b
10×5=50
cost 50×7=350
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