The length, breadth and height of a room are 10 meters, 8 meters and 7.5 meters respectively. Find the cost of white-washing the walls at the rate of Rs.25 for 100 square metres.
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Step-by-step explanation:
Area of the wall= L.S.A of a cuboid
= 2h(l+b)
= 2(7.5)[10+8]
= 15[18]
= 270 m²
Cost of white washing 100m²=25rs
Therefore, 270m² = 270/25
= 10.8 rs
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