At 13 50, Warren left Town C for Town D, driving at a speed of 70 km/h. At 16 50, Dylan also left Town C for Town D driving at a certain speed. Both of them did not change their speed throughout the journey. At 18 50, both of them passed a farm that was 210 km away from Town D. How many minutes earlier did Dylan reach Town D than Warren?
Duration that Warren travelled from 13 50 to 18 50 = 5 h
Distance that Warren travelled
= 5 x 70
= 350 km
Distance between Town C and Town D
= 350 + 210
= 560 km
Since Dylan passed the farm at the same time as Warren, it means that Dylan travelled 350 km in 2 hours.
Dylan's speed during the journey
= 350 ÷ 2
= 175 km/h
Duration that Dylan took to reach Town D after passing the farm
= 210 ÷ 175
= 1.2 h
Duration that Warren took to reach Town D after passing the farm
= 210 ÷ 70
= 3 h
Difference between the time they took to reach Town D
= 3 - 1.2
= 1.8 h
1 h = 60 min
1.8 h = 1.8 x 60 = 108 min
Dylan reached Town D 108 minutes earlier than Warren.
Answer(s): 108 min