RRB Group D 15-Sep-2018 Shift 1 Solved Paper

Question : 1 of 100

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Three-sevenths of my current age is the same as four-fifths of that of one of my cousin's. My age three years ago will be his age ten years hence. My current age is

Validate

Solution:

x

years
My cousin's age be

y

years
From the question,

\;{3}/{7} x=\;{4}/{5} y

⇒ \;\; y=\;{15}/{28} x

Also,

x-3=y+10

⇒ \;\; x-3=\;{15}/{28} x+10

\;\; \;{28 x-15 x}/{28}=13

\;\; \;{13 x}/{28}=13

⇒ \;\; x=28

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