Subject
Quantitative Aptitude
Topic
Age
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?
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?
ক)
30খ)
35গ)
36ঘ)
40Explanation
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 yearsRelated questions
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