Question

A train traveled 300 km in 5 hours and then increased in speed, traveling the final 100 km in 1.5 hours. What was the train's average speed in km/h?

66.7 km/h


60 km/h


61.5 km/h


54 km/h

Answer 1

vm=( 57.1+66,6)/2≈ 61,5 km/h

Explanation:

Answer 2

200 km....... 3,5 h
100 km........1,5 h

v1= 200/3,5=57,1
v2= 100/1,5= 66,6

vm=( 57.1+66,6)/2≈ 61,5 km/h