Lee started driving from Town B towards Town C at 13 45 at an average speed of 60 km/h. Owen began driving from Town B towards Town C at 15 35 at an average speed of 110 km/h.
- At what time did Owen pass Lee on the road?
- 1110 hours after passing Lee, Owen reached Town C. At what time did Lee reach Town C?
(a)
From 13 45 to 15 35 = 1 h 50 min
Time that Lee travelled before Owen started driving = 1 h 50 min
1 h = 60 min
1 h 50 min = 1
5060 h = 1
56 h
Distance that Lee travelled before Owen started driving
= 1
56 x 60
=
116 x 60
= 110 km
Difference between Owen's and Lee's speed
= 110 - 60
= 50 km/h
Time that Owen took to catch up with Lee
= 110 ÷ 50
= 2.2 h
= 2 h 12 min
2 h 12 min after 15 35 = 17 47
Time that Owen passed Lee on the road = 17 47
(b)
1
110 h = 1 h 6 min
Total time that Owen travelled
= 1 h 6 min + 2 h 12 min
= 3 h 18 min
3 h 18 min = 3
1860h = 3
310h
Distance between Town B and Town C
= 3
310 x 110
= 363 km
Time that Lee travelled from Town B to Town C
= 363 ÷ 60
= 6.05 h
= 6 h 3 min
6 h 3 min after 13 45 = 19 48
Time that Lee reached Town C = 19 48
Answer: (a) 17 47; (b) 19 48