. The distance between two stations is 425 km. Two trains start simultaneously from these stations on parallel tracks to cross each other

The speed of one of them is greater than that of the other by 5 km/h. If the distance between the two trains after 3 hours of their start is 20 km, find the speed of each train.

a. 65km/h, 70km/h

b. 70km/h, 80km/h