At 8.35 a.m., Fabian started driving from Town D to Town E which was 490 km away. For the first 210 km, he travelled at an average speed of 70 km/h. He then decreased his speed by 22 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 E?
(a)
Time taken for the first 210 km
= 210 ÷ 70
= 3/1
= 3 h
Speed for the remaining journey
= 70 - 22
= 48 km/h
Remaining distance
= 490 - 210
= 280 km
Time taken for the remaining journey
= 280 ÷ 48
= 5
4048= 5
56 h
Total time taken
= 3 + 5
56= 3/1 + 5
56= 8
56 h
(b)
1 h = 60 min
56 h =
56 x 60 = 50 min
8 h 50 min after 8.35 a.m. = 5.25 p.m.
Answer(s): (a) 88
56 h; (b) 5.25 p.m.