A bus entered the freeway and traveled at a constant speed of 40 mph. Two hours later a second bus followed the first bus, entering the freeway from the same point as the first bus, and traveled at a constant speed of 50 mph. How long will it take the second bus to catch up with the first bus?
A plane trip lasted for 5 hours and was 555 miles long. The average speed for the first part was 105 mph. The tailwind picked up, so the remainder of the trip was flown at an average speed of 115 mph. for how long did the plane fly at the first part of the trip?Play sound effects
A passenger train leaves the station 2 hours after a freight train leaves the same station. The freight train is traveling 20 mph slower than the passenger train. Then, the passenger train overtakes the freight train in 3 hours.
+ 2 = 5
---The distance is just "d" for both trains because they went __________ counting from the station to wherever they met.
A boat travels for three hours with a current of 3 mph and then returns the same distance against the current in 4 hours. What is the boat's speed in calm water?