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Solving Equations ax = b and (x/a) = b by Rearranging Terms

The cost of f...

Question

The cost of fencing a rectangular field of length 100 m and breadth 40 m is , if it costs ₹ 15 per metre.

A

₹ 2300

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B

₹ 4200

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C

₹ 8300

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D

₹ 6700

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Solution

The correct option is B ₹ 4200
Perimeter of the plot = 2l + 2b
= 2 $\times$ 100 + 2 $\times$ 40 = 200 + 80
= 280 m
Cost of fencing = ₹ 15 $\times$ 280 = ₹ 4200

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