Answer:
After 9 months, you will return ₹309
Explanation:
The amount of money you borrowed from your friend is ₹300.
If you are paying an extra amount of ₹3 every 3 months, then after 9 months, you are paying an extra amount of ₹9
The total amount you must pay her if you return the money after 9 months is ₹
₹
