A person invested a total of Rs. 57,500 at 4%, 5% and 8% per annum simple interest. At the end of the year, he received equal interest in all the three cases. The amount invested at 5% was:

A. Rs. 20,000

B. Rs. 20,750

C. Rs. 25,000

D. Rs. 37,500

Answer: Option A

Solution(By Examveda Team)

$$\eqalign{ & \frac{1}{4}:\frac{1}{5}:\frac{1}{8} \cr & 10:8:5 \cr & {\text{Amount invested at }}5\% \cr & = \frac{8}{{23}} \times 57,500 \cr & = 20,000 \cr} $$