At 12 40, Warren left Town S for Town T, driving at a speed of 74 km/h. At 15 40, Gabriel also left Town S for Town T driving at a certain speed. Both of them did not change their speed throughout the journey. At 18 40, both of them passed a mall that was 222 km away from Town T. How many minutes earlier did Gabriel reach Town T than Warren?

Distance that Warren travelled
= 6 x 74
= 444 km

Distance between Town S and Town T
= 444 + 222
= 666 km

Since Gabriel passed the mall at the same time as Warren, it means that Gabriel travelled 444 km in 3 hours.

Gabriel's speed during the journey
= 444 ÷ 3
= 148 km/h

Duration that Gabriel took to reach Town T after passing the mall
= 222 ÷ 148
= 1.5 h

Duration that Warren took to reach Town T after passing the mall
= 222 ÷ 74
= 3 h

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

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

Gabriel reached Town T 90 minutes earlier than Warren.

Answer(s): 90 min