At 11 55, Cody left Town G for Town H, driving at a speed of 73 km/h. At 14 55, Ken also left Town G for Town H driving at a certain speed. Both of them did not change their speed throughout the journey. At 17 55, both of them passed a museum that was 219 km away from Town H. How many minutes earlier did Ken reach Town H than Cody?

Distance that Cody travelled
= 6 x 73
= 438 km

Distance between Town G and Town H
= 438 + 219
= 657 km

Since Ken passed the museum at the same time as Cody, it means that Ken travelled 438 km in 3 hours.

Ken's speed during the journey
= 438 ÷ 3
= 146 km/h

Duration that Ken took to reach Town H after passing the museum
= 219 ÷ 146
= 1.5 h

Duration that Cody took to reach Town H after passing the museum
= 219 ÷ 73
= 3 h

Difference between the time they took to reach Town H
= 3 - 1.5
= 1.5 h

1 h = 60 min
1.5 h = 1.5 x 60 = 90 min

Ken reached Town H 90 minutes earlier than Cody.

Answer(s): 90 min