Question 993753
A ship left a port and sailed east at a rate of 20 mph. one hour later a second ship left the same port at the rate of 25 mph, also headed east. In how many hours did the second ship over take the first ship?

let x=travel time of 2nd ship
x+1=travel time of 1st ship
20(x+1)=25x
20x+20=25x
5x=20
x=4
In how many hours did the second ship over take the first ship? 4