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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?

 Jan 31, 2019
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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

 Jan 31, 2019

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