At 13 15, Rael left Town B for Town C, driving at a speed of 72 km/h. At 15 15, Carl also left Town B for Town C driving at a certain speed. Both of them did not change their speed throughout the journey. At 18 15, both of them passed a hypermart that was 216 km away from Town C. How many minutes earlier did Carl reach Town C than Rael?

Distance that Rael travelled
= 5 x 72
= 360 km

Distance between Town B and Town C
= 360 + 216
= 576 km

Since Carl passed the hypermart at the same time as Rael, it means that Carl travelled 360 km in 3 hours.

Carl's speed during the journey
= 360 ÷ 3
= 120 km/h

Duration that Carl took to reach Town C after passing the hypermart
= 216 ÷ 120
= 1.8 h

Duration that Rael took to reach Town C after passing the hypermart
= 216 ÷ 72
= 3 h

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

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

Carl reached Town C 72 minutes earlier than Rael.

Answer(s): 72 min