RRB Group D 22-Sep-2018 Shift 1 Solved Paper

Question : 74 of 100

Marks: +1, -0

The sum of the current ages of

\ {A}

and

\ {B}

is 77 years. Seven years ago A was 2.5 times as old as B. What is A's present age?

Solution:

Let present age of 'A' is

x

years.
Present age of 'B' is

y

years.

x+y=77

..... ( 1)
7 years ago,

x-7=2.5(y-7)

x-2.5 y=-10.5

...(2)
Solve (1) and (2),

x=52

years

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