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The length of a rectangular plot is 20 metres more than its breadth. If the cost of fencing the plot @ 26.50 per metre is Rs. 5300, what is the length of the plot in metres?

40
50
None of these
Data inadequate
Explanation:

Let breadth = x metres.

Then, length = (x + 20) metres.

Perimeter =$ \left(\dfrac{5300}{26.50} \right) $m = 200 m.

$\therefore$ 2[(x + 20) + x] = 200

$\Rightarrow$ 2x + 20 = 100

$\Rightarrow$ 2x = 80

$\Rightarrow$ x = 40.

Hence, length = x + 20 = 60 m.

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