Quantitative Aptitude Ques 2185

Question: A certain scheme of investment in simple interest declares that it triples the investment in 8 yr. If you want to quadruple your money through that scheme, then you have to invest it for [NICL (AO) 2015]

Options:

A) 10 yr

B) 10 yr 8 months

C) 11 yr 6 months

D) 12 yr

E) None of the above

Show Answer

Answer:

Correct Answer: D

Solution:

  • Let the principal be Rs. x. Then, amount = 3x Then, interest $ =3x-x=Rs.,2x $ Rate of interest $ =\frac{2x\times 100}{x\times 8}=25% $ New amount = 4x, Interest $ =4x-x=3x $ $ Time=\frac{3x\times 100}{25\times x}=12,yr $