At 14 55, Caden left Town V for Town W, driving at a speed of 81 km/h. At 16 55, Andy also left Town V for Town W driving at a certain speed. Both of them did not change their speed throughout the journey. At 18 55, both of them passed a library that was 243 km away from Town W. How many minutes earlier did Andy reach Town W than Caden?
Duration that Caden travelled from 14 55 to 18 55 = 4 h
Distance that Caden travelled
= 4 x 81
= 324 km
Distance between Town V and Town W
= 324 + 243
= 567 km
Since Andy passed the library at the same time as Caden, it means that Andy travelled 324 km in 2 hours.
Andy's speed during the journey
= 324 ÷ 2
= 162 km/h
Duration that Andy took to reach Town W after passing the library
= 243 ÷ 162
= 1.5 h
Duration that Caden took to reach Town W after passing the library
= 243 ÷ 81
= 3 h
Difference between the time they took to reach Town W
= 3 - 1.5
= 1.5 h
1 h = 60 min
1.5 h = 1.5 x 60 = 90 min
Andy reached Town W 90 minutes earlier than Caden.
Answer(s): 90 min
