A play ground is 220 m long and 100 m broad. A path 20 m wide runs breadth wise across the ground in the middle. The cost of gravelling the path at the rate of Rs. 10 per square meter will be----
A
Rs.2200
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B
Rs.220
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C
Rs.20000
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D
Rs.2000
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Solution
The correct option is CRs.20000 Let ABCD be the play ground and PQRS be the path laid breadthwise. Length of the path = 220 m Breadth of the path = 20 m ∴ Area of a path = Length × Breadth = 100 × 20 = 2000 m2 Cost of gravelling 1 sq. m = Rs 10 ∴ Cost of gravelling 2000 sq. m = 2000 × 10 = Rs 20000 Hence the cost of gravelling the path is Rs. 20000