At 14 35, Billy left Town V for Town W, driving at a speed of 90 km/h. At 16 35, 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 19 35, both of them passed a temple that was 180 km away from Town W. How many minutes earlier did Andy reach Town W than Billy?

Distance that Billy travelled
= 5 x 90
= 450 km

Distance between Town V and Town W
= 450 + 180
= 630 km

Since Andy passed the temple at the same time as Billy, it means that Andy travelled 450 km in 3 hours.

Andy's speed during the journey
= 450 ÷ 3
= 150 km/h

Duration that Andy took to reach Town W after passing the temple
= 180 ÷ 150
= 1.2 h

Duration that Billy took to reach Town W after passing the temple
= 180 ÷ 90
= 2 h

Difference between the time they took to reach Town W
= 2 - 1.2
= 0.8 h

1 h = 60 min
0.8 h = 0.8 x 60 = 48 min

Andy reached Town W 48 minutes earlier than Billy.

Answer(s): 48 min