A sum of Rs. 1,800 lent at SI of 10% per annum will become twice in__

20 years

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10 years

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8 years

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12 years

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Solution

The correct option is B 10 years
Simple Interest $S I = \frac{P N R}{100}$
Given, $A m o u n t A = 2 P$
$=> P + S I = 2 P$
$=> P + \frac{P \times N \times 10}{100} = 2 P$
$=> 0.1 N = 1$
$=> N = 10$ years

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