The ratio of the present ages of Ramesh and mahesh is 2:5. 10 years hence, the ratio of their ages will be 10:15. Find the difference in their present ages? Choose the correct choice from the following answers:
A) 7.5	B) 6	C) 5.5	D) 6.5	E) 5
Let the present ages of Ramesh and Mahesh be 2x and 5x years respectively.   (2x + 10)/(5x + 10) = 10/15   6x + 30 = 10x + 20 =&gt; x = 2.5   Difference in their ages will be the same at all times.   This difference = Difference of their present ages   =&gt; 5x - 2x = 3x 5  - 2= 
<gadget id="calculator">5  - 2</gadget>
<output>3</output>
3x=&gt; 7.5 years   7.5nswer: 7.5
<result>A</result>
The ratio of the present ages of Ramesh and mahesh is 2:5. 10 years hence, the ratio of their ages will be 10:15. Find the difference in their present ages?