A room is 6 m long, 4 m broad and 3 m high. Find the cost of laying tiles on its floor and four walls at the cost of Rs. 80/m2.
Given, a room with length, breadth, and height as 6 m, 4 m, and 3 m respectively and the cost of
laying tiles on its floor and four walls per m2 is Rs. 80.
We know, Area of four walls = 2×(l+b)×h
∴ Area of four walls = 2×(l+b)×h
= 2×(6+4)×3
= 2×10×3
= 60 m2
Area of floor = length × breadth
= 6 × 4
= 24 m2
∴ Cost of laying tiles on its floor and four walls at the rate of Rs. 80/m2= 80×(60+24)
= Rs. 80×84
= Rs. 6720
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