A woman is 30 times older than his son. 18 years later she will be thrice as old as her son. What is the woman’s present age in years?
সমাধান
সঠিক উত্তর: Option D
Let at present,
Woman's age be x
and her son's age be y
Then, A/Q,
x=30y ................................................. (1)
18 years later,
Woman's age = x+18
her son's age= y+18
Now, A/Q,
x+18=3*(y+18)
or, x+18=3y+54
or, x-3y=54-18
or, x-3y= 36
or, 30y - 3y = 36 [From eq (1)]
or, 27y = 36
or, y = 36/27 = 12/9 = 4/3
So, y= 4/3
Then, x= 30*4/3 = 40 years
