At 11 35, Julian left Town G for Town H, driving at a speed of 90 km/h. At 13 35, Zane also left Town G for Town H driving at a certain speed. Both of them did not change their speed throughout the journey. At 16 35, both of them passed a farm that was 270 km away from Town H. How many minutes earlier did Zane reach Town H than Julian?

Distance that Julian travelled
= 5 x 90
= 450 km

Distance between Town G and Town H
= 450 + 270
= 720 km

Since Zane passed the farm at the same time as Julian, it means that Zane travelled 450 km in 3 hours.

Zane's speed during the journey
= 450 ÷ 3
= 150 km/h

Duration that Zane took to reach Town H after passing the farm
= 270 ÷ 150
= 1.8 h

Duration that Julian took to reach Town H after passing the farm
= 270 ÷ 90
= 3 h

Difference between the time they took to reach Town H
= 3 - 1.8
= 1.2 h

1 h = 60 min
1.2 h = 1.2 x 60 = 72 min

Zane reached Town H 72 minutes earlier than Julian.

Answer(s): 72 min