a train traveled 421 miles in 5.5 hours. what was the trains speed in mile per hours

Answer 1

421/5.5. = about 76.55 mph = average speed

Its speed at any point in time may be higher or lower.

distance = rate of speed times time traveled

d = rt

r= d/t = 421/5.5 = 76.55 mph rounded off to nearest hundredth or about 77 mph