At 11 55, George left Town K for Town L, driving at a speed of 75 km/h. At 12 55, Ben also left Town K for Town L driving at a certain speed. Both of them did not change their speed throughout the journey. At 15 55, both of them passed a bakery that was 150 km away from Town L. How many minutes earlier did Ben reach Town L than George?

Distance that George travelled
= 4 x 75
= 300 km

Distance between Town K and Town L
= 300 + 150
= 450 km

Since Ben passed the bakery at the same time as George, it means that Ben travelled 300 km in 3 hours.

Ben's speed during the journey
= 300 ÷ 3
= 100 km/h

Duration that Ben took to reach Town L after passing the bakery
= 150 ÷ 100
= 1.5 h

Duration that George took to reach Town L after passing the bakery
= 150 ÷ 75
= 2 h

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

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

Ben reached Town L 30 minutes earlier than George.

Answer(s): 30 min