Question

the ages of Piyush and Mohit are in the ratio 5 : 7.4 years from now the ratio of their ages will be 3 : 4 . find their present ages .

Answer 1

let present age of piyush be 5x,
and mohit be7 y
then 
x:y=5:7   ---------------------equation 1
then after 4 years 
the ratin will be
x+4/y+4=3/4 -----------------equation 2
solve the equation you will get your answer ^_^