Present ages of souju and tharak are in the ratio of 6:4 respectively. Three years hence, the ratio of their ages will become 12:9 respectively. What is tharak's present age in years?
Choose the correct answer:
A) 2 years 7 months
B) 3 years 2 months
C) 3 years 5 months
D) 3 years 7 months
E) 4 years 7 months
Ratio of the present age of souju and tharak =6:4   Let present age of Souju =6x   Present age of Tharak =4x   After 3 years, ratio of their ages =12:9   ⇒(6x+3):(4x+3)=12:9   ⇒9(6x+3)=12(4x+3)   ⇒54x+27=44x+36   ⇒10x=36−27=9   =&gt;x=9/10= 
<gadget id="calculator">9/10</gadget>
<output>9/10 = around 0.9</output>
0.9   Tharak's present age=4x=4*0.9= 
<gadget id="calculator">4*0.9</gadget>
<output>3.6</output>
3.6=3 years 7 months   ANSWER:3 years 7 months
<result>D</result>
Present ages of souju and tharak are in the ratio of 6:4 respectively. Three years hence, the ratio of their ages will become 12:9 respectively. What is tharak's present age in years?