Fiona left home at 9.15 a.m. and drove towards the airport which was 896 km away. For the first 320 km, she was travelling at 64 km/h. Then she increased her speed by 8 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 320 km
= 320 ÷ 64
= 5 h
Distance of the remaining journey
= 896 - 320
= 576 km
Speed for remaining journey
= 64 + 8
= 72 km/h
Time taken to travel remaining journey
= 576 ÷ 72
= 8 h
Time taken to travel the whole journey
= 8 + 5
= 13 h
(b)
13 h after 9.15 a.m. = 10.15 p.m.
Answer(s): (a) 13 h; (b) 10.15 p.m.