Question

Distance between two station is 120km. for first trip the
train moves at the
the speed of
80 km/h. For the second
trin train moves 90 km/h. find the average speed ​

Answer 1

$average = \frac{distance + distance}{2} \\ = \frac{80 + 90}{2} = \frac{170}{2} \\ = 85 \: km/h$