RRB Non Technical Model Papers 10 with solutions

Question : 22 of 100

Marks: +1, -0

On a certain sum, the simple interest at the end of 6 years becomes

3/8

of the sum. The rate of interest is

Solution:

(2) Let the sum be P and rate of interest be r. So the simple interest will be

3/8p

. Now

3/8p={p×r×25/4}/100⇒r={3/8}×16=6%

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