Question

find the time after which the simple intrest on a sum of money will be double of the sum at the raie of 10℅ per annum
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Answer 1

Answer:

Let the sum be 100.

100 +( 100 × N x 10/100) = 200, where N is the period in years.

100 + 10 N = 200.

10 N = 100.

N = 10 .

Sum doubles in 10 years