a father said his son, ` ` i was as old as you are at present at the time of your birth. ` ` if the father age is 40 now, the son age 5 years back was
Choose the correct choice from the following.
A) 14  B) 17  C) 15  D) 19  E) 99
<gadget id="calculator">40 / 2</gadget>
<output>20</output>

<gadget id="calculator">20 - 5</gadget>
<output>15</output>

<result>C</result>
a father said his son, ` ` i was as old as you are at present at the time of your birth. ` ` if the father age is 40 now, the son age 5 years back was
subtract(divide(40, const_2), 5)
"let the son ' s present age be x years . then , ( 40 - x ) = x x = 20 . son ' s age 5 years back = ( 20 - 5 ) = 15 years answer : c"