Question

find the cost of painting the four walls of a room with dimensions 10mx5mx6m at the rate of 4 per m ²

Answer 1

CSA of cuboid = Area of 4 walls = 2h(l+b)

=> 2x6(10+5) m^2

=> (12 x 15) m^2

=> 180 m^2

Now,

Cost of painting 180 m^2= Rs(180x4) = Rs 720

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