Let the man and his son's age be 31x and 13x According to the question,
$31x+13x =2\times{44}$
44x=88
x=288
x = 2
$Son's age = 13x ={13}\times2=26years<u>AltenateMethod</u>RatioofManAndHisSon′sageis31:13Man:Son′s31:13(31+13)=2\times44=8844---->881----->2$Son's age 13--->13x2=26 years.