The ratio of the present age of Viju to that of Aju is 7:2. Four years from now, the ratio of the ages of Viju to Aju will be 5:2. What was Viju age 3 years ago ? (RBI Assistant 2015) Pick one: A) 24 B) 20 C) 12 D) 15 E) 18
Let the present age of Viju be 7x years and that of Aju be 2x years.   Then, 4 years from now   7x + 4 / 2x + 4 = 5 / 2   or 4x = 12   or x = 3   Viju present age = 7 * 3= 
<gadget id="calculator">7 * 3</gadget>
<output>21</output>
21 years   Viju age 3 years ago= 21 - 3= 
<gadget id="calculator">21 - 3</gadget>
<output>18</output>
18 years   answer :18
<result>E</result>
The ratio of the present age of Viju to that of Aju is 7:2. Four years from now, the ratio of the ages of Viju to Aju will be 5:2. What was Viju age 3 years ago ? (RBI Assistant 2015)