At 13 50, Vincent left Town W for Town X, driving at a speed of 63 km/h. At 16 50, Julian also left Town W for Town X driving at a certain speed. Both of them did not change their speed throughout the journey. At 19 50, both of them passed a cafe that was 189 km away from Town X. How many minutes earlier did Julian reach Town X than Vincent?

Distance that Vincent travelled
= 6 x 63
= 378 km

Distance between Town W and Town X
= 378 + 189
= 567 km

Since Julian passed the cafe at the same time as Vincent, it means that Julian travelled 378 km in 3 hours.

Julian's speed during the journey
= 378 ÷ 3
= 126 km/h

Duration that Julian took to reach Town X after passing the cafe
= 189 ÷ 126
= 1.5 h

Duration that Vincent took to reach Town X after passing the cafe
= 189 ÷ 63
= 3 h

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

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

Julian reached Town X 90 minutes earlier than Vincent.

Answer(s): 90 min