Pierre started driving from Town H towards Town J at 14 30 at an average speed of 60 km/h. Xavier began driving from Town H towards Town J at 16 20 at an average speed of 110 km/h.
- At what time did Xavier pass Pierre on the road?
- 1110 hours after passing Pierre, Xavier reached Town J. At what time did Pierre reach Town J?
(a)
From 14 30 to 16 20 = 1 h 50 min
Time that Pierre travelled before Xavier started driving = 1 h 50 min
1 h = 60 min
1 h 50 min = 1
5060 h = 1
56 h
Distance that Pierre travelled before Xavier started driving
= 1
56 x 60
=
116 x 60
= 110 km
Difference between Xavier's and Pierre's speed
= 110 - 60
= 50 km/h
Time that Xavier took to catch up with Pierre
= 110 ÷ 50
= 2.2 h
= 2 h 12 min
2 h 12 min after 16 20 = 18 32
Time that Xavier passed Pierre on the road = 18 32
(b)
1
110 h = 1 h 6 min
Total time that Xavier travelled
= 1 h 6 min + 2 h 12 min
= 3 h 18 min
3 h 18 min = 3
1860h = 3
310h
Distance between Town H and Town J
= 3
310 x 110
= 363 km
Time that Pierre travelled from Town H to Town J
= 363 ÷ 60
= 6.05 h
= 6 h 3 min
6 h 3 min after 14 30 = 20 33
Time that Pierre reached Town J = 20 33
Answer: (a) 18 32; (b) 20 33