A vehicle covers half the distance with uniform speed v1 and the other half with uniform speed v2. The average speed of the vehicle is

If 30% of the distance is covered by A at 20 km/h and the remaining distance is covered at 70 km/h, then the average speed of A is :

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?

Walking at the rate of 4 km/h a man covers a certain distance in 2 hours 45 min. Running at a speed of 16.5 km/h, the man will cover the same distance in