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May 9, 2018 (1 Questions)

Q. The ratio of the present ages of Rohit and his father is 1 : 5 and that of his mother and father is 4 : 5. After 2 years the ratio of the age of the son to that of his mother becomes 3 : 10. What is the present age of the father?

a) 45 year

b) 46 year

c) 36 year

d) 40 year

e) None of these
Model Answer :

ans (e)

Ratio of Rohit: Father = 1: 5

Ratio of his Father: Mother = 5 : 4

Ratio of Rohit: Father: Mother = 1: 5: 4 ⇒ x : 5x  : 4x

⇒ (x+2)/ (4x+2) = 3/10

⇒ 10x+20=12x+6

⇒ x= 7

Father’ age ⇒ 7 × 5

= 35 years

Subjects : Quantitative Aptitude

7 Answers GovJobAdda, Bengaluru 1 month ago
Amar's thumbnail

Amar 1 month ago Top Answer
4 Likes - 1 Comments - 0 Feedbacks

Eliminate b) & c) bcoz these r not multiples of 5.

Take 45= father's age, rohit's age becums 9...after 2 yrs--> 11 yrs--> not multiple of 3..so eli...

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