A rectangular field 80 m long and 50 m wide has two roads, each 4 m wide, running through the middle, one parallel to the length and the other parallel to the breadth. What is the cost of paving the roads at Rs. 15 per square metre?
Correct answer C. Rs. 7,560
Explanation
Road area = 80 x 4 + 50 x 4 - 4 x 4 = 320 + 200 - 16 = 504 sq m (the crossing is counted once). Cost = 504 x 15 = Rs. 7,560.
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