Speed: แบบฝึกหัด

A bus travels at a constant speed. It takes \(45\) minutes to travel \(54\) km. What is the speed of the bus in km/h?

A car travels from City X to City Y. It travels the first \(120\) km at a speed of \(60\) km/h and the remaining \(180\) km at a speed of \(90\) km/h. What is the average speed for the entire journey?

A car travels from Town A to Town B at an average speed of \(60\) km/h for 2 hours, and then continues from Town B to Town C at \(90\) km/h for 1 hour. What is the average speed of the car for the whole journey from Town A to Town C?

A car travels at a speed of \(72\) km/h. If it maintains this speed, how many meters can it travel in \(15\) seconds?

A car travels at a speed of 85 km/h. If it maintains this speed, how many kilometres can it travel in 3 hours and 12 minutes?

A cyclist travels from Town A to Town B at a speed of 18 km/h. The distance between the two towns is 45 km.
(a) How many hours and minutes does the journey from Town A to Town B take?
(b) On the return journey from Town B to Town A, the cyclist takes 3 hours. What is the average speed for the entire round trip (from A to B and back to A)?