The following information has been obtained from the books of Vivek Ltd.: 

10% Debentures  ₹15,00,000 

Current Liabilities ₹2,00,000 

Non-Current Assets ₹25,00,000 

Current Assets  ₹7,00,000 

During the year ended 31st March, 2024, net profit after interest and tax amounted to ₹4,10,000. Tax paid was ₹40,000.  

Calculate Return on Investment.  

Marks-4, CBSE: 2024-25/Zone-6/Set-1/Q-33(a)