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

A. 40 m

B. 50 m

C. 120 m

D. None of these

Correct Answer :

D. None of these

L e t b r e a d t h = x m e t r e s . T h e n, l e n g t h = (x + 20) m P e r i m e t e r = (\frac{5300}{26.50}) m = 200 m ∴ 2 [(x + 20) + x] = 200, 2 x + 20 = 100, 2 x = 80, x = 40 H e n c e, l e n g t h = x + 20 = 40 + 20 = 60 m

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