Quantitative Aptitude :: Area Problems And Answers

8. A rectangular grassy plot 100 m. by 70 m has a gravel path 2.5 m wide all round it on the inside. Find the cost of gravelling the path at 90 paise per sq. metre.

A. Rs.700 B. Rs.708.50
C. Rs.732.50 D. Rs.742.50
Answer & Explanation

Answer: Option D

Explanation:
Area of the plot = (100 x 70) m2 = 7000 m2
Area of the plot excluding the path = [(100 - 5) * (70 - 5)] m2 = 6175 m2.
Area of the path = (7000 - 6175) m2 = 825 m2.
Cost of gravelling the path = Rs.825 * (90/100)=  Rs.742.50


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