At 11 40, Sam left Town F for Town G, driving at a speed of 70 km/h. At 14 40, Jenson also left Town F for Town G driving at a certain speed. Both of them did not change their speed throughout the journey. At 16 40, both of them passed a playground that was 280 km away from Town G. How many minutes earlier did Jenson reach Town G than Sam?

Distance that Sam travelled
= 5 x 70
= 350 km

Distance between Town F and Town G
= 350 + 280
= 630 km

Since Jenson passed the playground at the same time as Sam, it means that Jenson travelled 350 km in 2 hours.

Jenson's speed during the journey
= 350 ÷ 2
= 175 km/h

Duration that Jenson took to reach Town G after passing the playground
= 280 ÷ 175
= 1.6 h

Duration that Sam took to reach Town G after passing the playground
= 280 ÷ 70
= 4 h

Difference between the time they took to reach Town G
= 4 - 1.6
= 2.4 h

1 h = 60 min
2.4 h = 2.4 x 60 = 144 min

Jenson reached Town G 144 minutes earlier than Sam.

Answer(s): 144 min