At 14 15, Owen left Town F for Town G, driving at a speed of 93 km/h. At 16 15, David also left Town F for Town G driving at a certain speed. Both of them did not change their speed throughout the journey. At 19 15, both of them passed a cinema that was 279 km away from Town G. How many minutes earlier did David reach Town G than Owen?

Distance that Owen travelled
= 5 x 93
= 465 km

Distance between Town F and Town G
= 465 + 279
= 744 km

Since David passed the cinema at the same time as Owen, it means that David travelled 465 km in 3 hours.

David's speed during the journey
= 465 ÷ 3
= 155 km/h

Duration that David took to reach Town G after passing the cinema
= 279 ÷ 155
= 1.8 h

Duration that Owen took to reach Town G after passing the cinema
= 279 ÷ 93
= 3 h

Difference between the time they took to reach Town G
= 3 - 1.8
= 1.2 h

1 h = 60 min
1.2 h = 1.2 x 60 = 72 min

David reached Town G 72 minutes earlier than Owen.

Answer(s): 72 min