The difference between the ages of two persons is 10 years. Fifteen years ago, the elder one was twice as old as the younger one. The present age of the elder person is?
Choose the correct answer
A) 35yr B) 25yr C) 20yr D) 30yr E) 40yr
Let their ages be x years and (x+10) years   Then, (x+10) - 15 = 2(x-15)   x - 5 = 2x-30   x = 25   Present age of the elder person = 25+10= 
<gadget id="calculator">25+10</gadget>
<output>35</output>
35 years   35yrnswer is 35yr
<result>A</result>
The difference between the ages of two persons is 10 years. Fifteen years ago, the elder one was twice as old as the younger one. The present age of the elder person is?