At 13 35, Cole left Town X for Town Y, driving at a speed of 79 km/h. At 16 35, Ian also left Town X for Town Y driving at a certain speed. Both of them did not change their speed throughout the journey. At 19 35, both of them passed a mosque that was 237 km away from Town Y. How many minutes earlier did Ian reach Town Y than Cole?
Duration that Cole travelled from 13 35 to 19 35 = 6 h
Distance that Cole travelled
= 6 x 79
= 474 km
Distance between Town X and Town Y
= 474 + 237
= 711 km
Since Ian passed the mosque at the same time as Cole, it means that Ian travelled 474 km in 3 hours.
Ian's speed during the journey
= 474 ÷ 3
= 158 km/h
Duration that Ian took to reach Town Y after passing the mosque
= 237 ÷ 158
= 1.5 h
Duration that Cole took to reach Town Y after passing the mosque
= 237 ÷ 79
= 3 h
Difference between the time they took to reach Town Y
= 3 - 1.5
= 1.5 h
1 h = 60 min
1.5 h = 1.5 x 60 = 90 min
Ian reached Town Y 90 minutes earlier than Cole.
Answer(s): 90 min
