A certain sum becomes 7 times in 8 years at simple interest then in how many years it will become 19...........

Quantitative Aptitude (CPO) Simple Interest

A certain sum becomes 7 times in 8 years, at simple interest, then in how many years it will become 19 times?

Correct option 4: 24

Let the principal amount be P.

Since amount becomes 7 times in 8 years.

So, S.I for 8 years = 6P

If amount is 19 times then SI = 18P

Using uniary method

6P interest ----- 8 years

P interest ------- 8/6

18 P interest----18x(8/6)=24 years

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