It took 3.5 hours for a train to travel the distance between two cities at a velocity 120 miles/hry. how many miles lie between the two cities? what does it look like solving with the equation?

           Speed  =  (distance covered)  /  (time to cover tyhe distance)

           120 m/h  =  (distance)              /            3.5 hours

Multiply each side
by  3.5 hours:

                (120 mile/hour) x (3.5 hr)  =  distance

                   distance  =  420 miles