Question

What sum will amount to Rs. 5,200 in 6 years at the same rate of simple interest at which
Rs. 1,706 amounts to Rs. 3,412 in 20 years? (Ans. Rate percent = 5; Principal = Rs. 4,000)
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Answer 1

Answer:

If Simple interest is calculated, the amount of Rs 1706 doubles in 20 years at Rate of interest = 100/20 = 5%

Now, Let the unknown sum = x

5% interest for 6 years means total 30% interest.

=> 5200 represents 130% of x.

x = 5200/13% = Rs 4000

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