Parameshwaran invested an amount of 12,000 at the simple interest rate of 10 pcpa and another amount at the simple interest rate of 20 pcpa. The total interest earned at the end of one year on the total amount invested became 14 pcpa. Find the total amount invested Choose the correct option
A) 22,000	B) 25,000	C) 20,000	D) 24,000	E) None of these
Let the amount invested at 20% rate be x. According to the question,   12000 × 10⁄100 + x × 20⁄100 = (12000 + x) × 14⁄100   or, 1200 + x⁄5 = 1680 + 7⁄50x   or, x⁄5 - 7⁄50x = 480   or, 3⁄50x = 480   \ x = 8000   \ Total amount invested = (12000 + 8000)= 
<gadget id="calculator">(12000 + 8000)</gadget>
<output>20_000</output>
20000   Answer 20,000
<result>C</result>
Parameshwaran invested an amount of 12,000 at the simple interest rate of 10 pcpa and another amount at the simple interest rate of 20 pcpa. The total interest earned at the end of one year on the total amount invested became 14 pcpa. Find the total amount invested