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Area - General Aptitude

Q1:

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?

A 40

B 50

C 120

D Data inadequate

E None of these

ANS:E - None of these

Let breadth = x metres. Then, length = (x + 20) metres.

Perimeter = 5300 m = 200 m.
26.50
 2[(x + 20) + x] = 200  2x + 20 = 100  2x = 80  x = 40. Hence, length = x + 20 = 60 m.