8RB Group D 23-Sep-2018 Shift 1 Solved Paper

Question : 63 of 100

Marks: +1, -0

Murali's age 10 years ago was thrice the ago of his son Satheesh. Ten years hence, Murali's ago will be twice that of Satheesh. The ratio of their present ages is:

9: 2
7: 3
13: 4
5: 2

Validate

Solution:

({M}-10)=3({S}-10)

{M}-3{ S}=-20

....(1)

({M}+10)=2({S}+10)

{M}-2 {S}=10

...(2)
From (1) and

(2), {M}=70, {S}=30

{M}: {S}=7: 3

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