At 8.50 a.m., Paul started driving from Town Y to Town Z which was 470 km away. For the first 210 km, he travelled at an average speed of 84 km/h. He then decreased his speed by 24 km/h and completed the remaining journey.
- Find the total time taken for the whole journey. Express your answer as a mixed number.
- At what time did she reach Town Z?
(a)
Time taken for the first 210 km
= 210 ÷ 84
= 2
4284 = 2
12 h
Speed for the remaining journey
= 84 - 24
= 60 km/h
Remaining distance
= 470 - 210
= 260 km
Time taken for the remaining journey
= 260 ÷ 60
= 4
2060= 4
13 h
Total time taken
= 2
12 + 4
13= 2
36 + 4
26= 6
56 h
(b)
1 h = 60 min
56 h =
56 x 60 = 50 min
6 h 50 min after 8.50 a.m. = 3.40 p.m.
Answer(s): (a) 66
56 h; (b) 3.40 p.m.