Jaden and Dani are both travelling by train. Jaden's train travels 130 km in 75 minutes.
Dani's train travels 312 km.
It leaves at 15:15 and arrives at 18:30
Work out the difference, in km/h, between the average speed of their trains.

Average speed for Jaden’s train
= 130 km / (75/60) hours
= 130 km / 1.25 hours
= 104 km/h

Dani’s train travels from 15:15 to 18:30, which is 3 hours and 15 mins.
3 hours and 15 mins = 3.25 hours

Average speed of Dani’s train
= 312 km / 3.25 hours
= 96 km/h

Difference
= 104 - 96
= 8 km/h