Question

Babu is 20 years older than binu in 5 years babu will be twise as old as binu find their present ages

Answer 1

Let,'x' be present age of Babu and of Binu be 'y'

According to condition,
x=20+y.
x-y=20. (1)
According to 2nd condition,
x+5=2y
x-2y=-5. (2)

Subtract (2) from (1)
x-y=20
-x-2y=-5
(-) (+). (+)
――――――
y=25 years

Put value of 'y' in eqn (1)

x-25=20
x=20+25
=45 years

So,
present age of Babu and Binu are 45 years and 25 years respectively.

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