A music teacher borrowed ₹8,200 from a friend at 6.5% simple interest per annum. After 3 years, he repaid the amount along with a small donation of ₹280 to his friend's charity. Find the total amount he paid.

Correct option is A

Given:
Principal = 8200
Rate of Interest = 6.5% per annum
Time = 3 years
Donation = 280
Formula Used:
Simple Interest = $$\frac{Principal × Rate × Time}{100}$$​​
Total Amount = Principal + Simple Interest + Donation
Solution:
Calculate the Simple Interest.
SI = $$\frac{8200 × 6.5 × 3}{100}$$​​
SI = 82 × 19.5 = 1599
The interest accumulated over 3 years is 1599.
Total repayment to the friend = 8200 + 1599 = 9799
Total amount paid including the donation = 9799 + 280 = 10079
Final Answer
So the correct answer is (a)