Quantitative Aptitude Ques 1941
Question: A certain scheme of investment in simple interest declares that it trebles the investment in 8 yr. If you want to quadruple your money through that scheme, you have to invest it for
Options:
A) 11 yr
B) 14 yr
C) 10 yr
D) 12 yr
Show Answer
Answer:
Correct Answer: D
Solution:
- Principal = Rs. x, Amount = Rs. 3x Case I SI = Amount $ - $ Principal = Rs. 2x
$ \therefore $ $ \text{Rate=}\frac{\text{SI }\times\text{ 100}}{\text{Principal }\times\text{ Time}} $ $ =\frac{2x\times 100}{x\times 8}=25 $ % Case II $ \text{Time=}\frac{\text{SI }\times\text{ 100}}{\text{Principal }\times\text{ Rate}}=\frac{3x\times 100}{x\times 25}=12yr $
BETA
