Question

2.
i
13. A sum of money doubles itself in 10
years. A compound interest is charged on
it at x% p.a. with the same rate p.a. it will
four-fold itself in
(a) 15 years
(b) 20 years
(C) 40 years
(d) 30 years
​

Answer 1

Answer:

40 years...

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