A room is 8 m long, 6 m wide and 4 m high. What is the cost of painting its four walls at Rs. 35 per square metre?
Correct answer B. Rs. 3,920
Explanation
Area of four walls = 2(l + b) x h = 2(8 + 6) x 4 = 112 sq m. Cost = 112 x 35 = Rs. 3,920.
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