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? Pick one
A) 20,000
B) 20,007
C) 20,005
D) 20,002
E) 20,001
Let the second amount be Rs. x. Then,   (12000 * 10 * 1)/100 + (x * 20 * 1)/100 = [(12000 + x) * 14 * 1] / 100   120000 + 20x = 16800 + 14x   x = 8000   Total investment = 12000 + 8000 = Rs. 20,000.20,000nswer: 20,000
<result>A</result>
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?