Question

What is rate of SI for first 5 years if sum of $Rs.400$ becomes $Rs.600$ in 9 years and rate of interest for last 4 years is $6$%?

• A. $6.5$%
• B. $7$%
• C. $7.5$%
• D. $6$%

Answer 1

Answer: (A)

$6.5$%

Interest for last 4 years $=\frac{P\times R\times 5}{100}$
$=\frac{400\times 6\times 4}{100}$
Interest for year $=600-400=Rs.200$
Interest for first 5 years $=200-96$
$Rs.104$
Rate for first 4 years $=\frac{104\times 100}{400\times 4}$
$=\frac{104}{16}=6.5$%