The dimensions of a room are 10m x 7m x 5m. There are 2 doors and 3 windows in the room. The dimensions of the doors are 1m x 3m. One window is of size 2m x 1.5m and the other 2 windows are of size 1m x 1.5m. The cost of painting the walls at Rs. 3 per sq m is
A) Rs.174
B) Rs.274
C) Rs.374
D) Rs.474
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Firstly we have to find the lateral surface area
=> 2(l+b)×h
=> 2(10+7)×5 - 7.5
=> 2(17)×5 - 7.5
=> 34 ×5 - 7.5
=> 170 - 7.5
=> 162.5 m^2
Price of painting 162.5m^2
=> 1m^2 = 3rupees
=> 162.5 × 3 rupees
=> 487.5 rupees Ans.
=> 2(l+b)×h
=> 2(10+7)×5 - 7.5
=> 2(17)×5 - 7.5
=> 34 ×5 - 7.5
=> 170 - 7.5
=> 162.5 m^2
Price of painting 162.5m^2
=> 1m^2 = 3rupees
=> 162.5 × 3 rupees
=> 487.5 rupees Ans.
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