1.

A sum was put at simple interest at a certain rate for 10 years. Had it been put at 5% higher rate it would have, fetched Rs 600 more. What was the sum ?

Answer»

Rs. 1200



Let the sum be Rs X and RATE of SI be y% p.a.
New Rate = (y + 5)% p.a.
x(y - 5) x 10/100 - x x y x 10/100 = 600
xy + 5X/10 - xy/10 = 600
xy + 5x - xy/10 = 600
x = 600x10/5
= 1200



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