At 11.45 a.m., Fabian started driving from Town S to Town T which was 500 km away. For the first 180 km, he travelled at an average speed of 75 km/h. He then decreased his speed by 25 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 T?
(a)
Time taken for the first 180 km
= 180 ÷ 75
= 2
3075 = 2
25 h
Speed for the remaining journey
= 75 - 25
= 50 km/h
Remaining distance
= 500 - 180
= 320 km
Time taken for the remaining journey
= 320 ÷ 50
= 6
2050= 6
25 h
Total time taken
= 2
25 + 6
25= 2
25 + 6
25= 8
45 h
(b)
1 h = 60 min
45 h =
45 x 60 = 48 min
8 h 48 min after 11.45 a.m. = 8.33 p.m.
Answer(s): (a) 88
45 h; (b) 8.33 p.m.