Question

A sum was put at SI at a certain rate for $6$ yr.If it had been put at $4/s$ higher rate, it would have fetched Rs. $960$ more. The sum was

• A. $Rs.3000$
• B. $Rs.3500$
• C. $Rs.4000$
• D. $Rs.4500$

Answer 1

The correct option is C $Rs.4000$

Let the Principal be Rs. P and Ratebe R%.
According to the question,
$\frac{P\times (R+4)\times 6}{100}-\frac{P\times R\times 6}{100}=960$
$\frac{24P}{100}=960\therefore$ P = Rs. $4000$