At 14 20, Henry left Town V for Town W, driving at a speed of 81 km/h. At 15 20, Valen also left Town V for Town W driving at a certain speed. Both of them did not change their speed throughout the journey. At 18 20, both of them passed a florist that was 162 km away from Town W. How many minutes earlier did Valen reach Town W than Henry?

Distance that Henry travelled
= 4 x 81
= 324 km

Distance between Town V and Town W
= 324 + 162
= 486 km

Since Valen passed the florist at the same time as Henry, it means that Valen travelled 324 km in 3 hours.

Valen's speed during the journey
= 324 ÷ 3
= 108 km/h

Duration that Valen took to reach Town W after passing the florist
= 162 ÷ 108
= 1.5 h

Duration that Henry took to reach Town W after passing the florist
= 162 ÷ 81
= 2 h

Difference between the time they took to reach Town W
= 2 - 1.5
= 0.5 h

1 h = 60 min
0.5 h = 0.5 x 60 = 30 min

Valen reached Town W 30 minutes earlier than Henry.

Answer(s): 30 min