A bus travels 120 km at 60 km/h and 180 km at 90 km/h. Average speed?

Average speed for half distance at 20 m/s and half at 30 m/s

Without stoppages, a train travels at an average speed of 60 km/h and with stoppages it covers the same distance at an average speed of 48 km/h. How many minutes per hour does the train stop?

Half distance at 10 m/s and remaining half at 40 m/s. Average speed?

There are two stations X and Y, 1320 km apart. A train starts from station X at 6 a.m. and moves at an average speed of 60 km/hr. At 2 p.m. another train starts from Y towards X and moves at an avera…

A 200 m train at 90 km/h overtakes a 250 m train at 60 km/h in same direction. Time?