If a train travels 100. km in 1.0 hr and another 200. km in 1.5 hr, what is its average speed for the entire trip?
+36916 I assume YOU are travelling on both of the trains....
(Train 1 distance + train 2 distance) / (train 1 time + train 2 time) = average speed
(100 km + 200 km) / ( 1 hr + 1.5 hr)
300 / 2.5 = 120 km/hr average
