The distance between a and B is 150km. It takes a bus two hours to travel 23 times. If the speed remains the same, how many hours will it take for the rest of the journey?

The distance between a and B is 150km. It takes a bus two hours to travel 23 times. If the speed remains the same, how many hours will it take for the rest of the journey?

150 × (1-23) / (150 × 23 / 2) = 150 × 13 / 2 (100 / 2) = 50 / 50 = 1 (hour). A: the rest of the journey will take another hour

A car goes from place a to place B at the speed of 100 km / h. after arriving at place B, it drives back from place B to place a at the speed of 60 km / h. The average speed of this car is______ Kilometers

(1 + 1) △ 1100 + 160, = 2 △ 8300, = 75 (km); a: the average speed of this car is 75 km

The distance between a and B is 140 km. It takes 2.5 hours for a car to go from a to B, and it takes less than 1 hour to return. The average speed of the car is () km / h

140 * 2 = 280 km, 280 / (2.5 * 2-1) = 70 km / h

The distance between a and B is 140 km. It takes 5 hours for a car to go from a to B, and 4 hours for a car to return from B to A. find the average speed of the car to and from a and B

140*2/(5+4)