Question

The age of two friend. ani and Biju differ by 3 years. ani father Dharam is twice as old as his ani and Biju as twice as old as his sister cathy. the age of cathy and Dharam differ by 30 years. find the age of Ani and Biju
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Answer 1

age of ani be x

so ani's father will be 2x

let biju's age be y

age age of biju sister cathy is y/2

if x>y

then

2x-y/2=30

4x-y=60 ----------------(1)

x-y=3-------------------(2)

on subtracting equation 2 from 1

4x-y-(x-y)=60-3

>3x=57

>x=19

from equation 2

x-y=3

19-y=3

y=16

therefore age of biju is equals to 16 and age of any is equal to 19