The sum of the present ages of two persons A and B is 60. If the age of A is twice that of B, find the sum of their ages 4 years hence?  Select the correct option.
A) 50  B) 60  C) 68  D) 80  E) 90
A + B = 60, A = 2B   2B + B = 60 =&gt; B = 20 then A = 40.   5 years, their ages will be 44 and 24.   Sum of their ages = 44 + 24= 
<gadget id="calculator">44 + 24</gadget>
<output>68</output>
68.   ANSWER:68
<result>C</result>
The sum of the present ages of two persons A and B is 60. If the age of A is twice that of B, find the sum of their ages 4 years hence?