At 11 55, Vaidev left Town H for Town J, driving at a speed of 75 km/h. At 13 55, Valen also left Town H for Town J driving at a certain speed. Both of them did not change their speed throughout the journey. At 15 55, both of them passed a salon that was 225 km away from Town J. How many minutes earlier did Valen reach Town J than Vaidev?

Distance that Vaidev travelled
= 4 x 75
= 300 km

Distance between Town H and Town J
= 300 + 225
= 525 km

Since Valen passed the salon at the same time as Vaidev, it means that Valen travelled 300 km in 2 hours.

Valen's speed during the journey
= 300 ÷ 2
= 150 km/h

Duration that Valen took to reach Town J after passing the salon
= 225 ÷ 150
= 1.5 h

Duration that Vaidev took to reach Town J after passing the salon
= 225 ÷ 75
= 3 h

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

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

Valen reached Town J 90 minutes earlier than Vaidev.

Answer(s): 90 min