[PP Sub Inspector 17 Aug 2021] 

8. The compound interest on a certain sum for 2 years at 10% per anum is ₹ 546. The simple interest on the same sum for double the time at half the rate percent per annum is:

1. ₹ 540

2. ₹420

3. ₹500

4. ₹520

Correct Answer :

₹520