Question

The ratio of simple interest earned on investing the same amount for 12 years and 18 years at the same rate of interest is :.

• A. 4
• B. 5
• C. 2
• D. 3

Answer 1

Answer: (C), (D)

3

We know $SI=\frac{P\times R\times T}{100}$

At $T=12$ years

$\Rightarrow SI=\frac{P\times R\times 12}{100}$

Similarly for $T=18$ years

$\Rightarrow SI=\frac{P\times R\times 18}{100}$

The ratio of simple interst earned by certain amount at the same rate of interest for 12 years and 18 years is

$\frac{P\times R\times 12}{100}:\frac{P\times R\times 18}{100}=2:3$