A covered 240km at 60km/h and 80km at 100km/h and 200km at 50km/h.what is the average speed during the whole journey

A motorcyclist is trying to leap across a canyon by driving horizontally of the cliff that is 70.0 m high at 38.0 m/s. Ignoring air resistance, use energy conservation to find the speed with which the cycle strikes the ground at a height of 35.0m on the other side of the canyon. You do not need to...

Suppose you go 75 mph for 53 miles, 55 mph for 21 miles and 35 mph for 3 miles... what is your average speed?

a car travels a certain distance with a speed of 40m/s and returns with a speed 'u'. If the average speed for the whole journey is 48m/sec what is the value of'u'?

Let me know this Speed of veh ? Dist covered 8 km Time 20 min