Jane left home at 5.15 a.m. and drove towards the airport which was 901 km away. For the first 385 km, she was travelling at 77 km/h. Then she increased her speed by 9 km/h and completed the remaining journey.
- How long did she take for her whole journey?
- At what time did she reach the airport?
(a)
Time taken to travel 385 km
= 385 ÷ 77
= 5 h
Distance of the remaining journey
= 901 - 385
= 516 km
Speed for remaining journey
= 77 + 9
= 86 km/h
Time taken to travel remaining journey
= 516 ÷ 86
= 6 h
Time taken to travel the whole journey
= 6 + 5
= 11 h
(b)
11 h after 5.15 a.m. = 4.15 p.m.
Answer(s): (a) 11 h; (b) 4.15 p.m.