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.