A sum, when invested at 10% simple interest per annum, amounts to Rs. 2880 after 2 years. What is the simple interest (in Rs.) on the same sum at the same rate of interest in 2 years?

Correct option is C

Given:

Final Amount (A) after 2 years = ₹2880
Time (T) = 2 years
Rate of Interest (R) = 10% per annum
Formula Used:
Simple Interest (SI) = $$\frac {P × R × T}{ 100}$$​​
Amount = Principal + S.I
Solution:
Amount = Principal + S.I 
​​2880 =$$P + \left( \frac{P \times 10 \times 2}{100} \right)$$​​
2880 = P + $$\frac{P}{5}$$ 
2880 = $$\frac{6P}{5}$$​  
P = 2400
Simple Interest on same sum = $$\frac{2400 × 10 × 2}{100} = ₹480$$​​