Peter invested an amount of Rs. 12,000 at the rate of 10% p.a simple interest and another amount at the rate of 20% p.a. simple interest. The total interest earned at the end of one year on the total amount invested became 14% p.a. Find the total amount invested?

• A. Rs. 20,000
• B. Rs. 22,000
• C. Rs. 24,000
• D. Rs. 25,000