Question

Q. If Abdul invested a sum of money at 5% pa SI, how long will it take to increase the value by 40%?

• A. 8 years
• B. 9 years
• C. 10 years
• D. 11 years
• E. None of these

Answer 1

The correct option is A 8 years

For principal amount = x
SI = 40% of $x=\frac{40}{100}\times x=\frac{2}{5}x,$ RI = 5%
$\frac{2}{5}x=x\times \frac{5}{100}\times t$
$t=\frac{200}{25}$ = 8 years