Question

The sum of the present ages of a, b, c is 45 yrs. three years ago their ages were in the ratio 1:2:3. what is the present age of a

Answer 1

let age of a,b,c be x,2x,3x

then,

x+2x+3x=45

now,
6x=45
x=45/6
x=15/2


hence,the present age of a is 15/2 i.e7.5