Fiona left home at 5.20 a.m. and drove towards the airport which was 978 km away. For the first 258 km, she was travelling at 86 km/h. Then she increased her speed by 4 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 258 km
= 258 ÷ 86
= 3 h
Distance of the remaining journey
= 978 - 258
= 720 km
Speed for remaining journey
= 86 + 4
= 90 km/h
Time taken to travel remaining journey
= 720 ÷ 90
= 8 h
Time taken to travel the whole journey
= 8 + 3
= 11 h
(b)
11 h after 5.20 a.m. = 4.20 p.m.
Answer(s): (a) 11 h; (b) 4.20 p.m.