A father said to his son, "I was as old as you are at the present at the time of your birth". If the father's age is 46 years now, the son's age five years back was	Choose the correct option
A) 16years B) 17years C) 18years D) 19years E) 20years
Let the son's present age be x years. Then, (46 - x) = x   2x = 46.   x = 23.   Son's age 5 years back (23 - 5)= 
<gadget id="calculator">(23 - 5)</gadget>
<output>18</output>
18 years.   18years)
<result>C</result>
A father said to his son, "I was as old as you are at the present at the time of your birth". If the father's age is 46 years now, the son's age five years back was