Julie left home at 5.45 a.m. and drove towards the airport which was 930 km away. For the first 234 km, she was travelling at 78 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 234 km
= 234 ÷ 78
= 3 h
Distance of the remaining journey
= 930 - 234
= 696 km
Speed for remaining journey
= 78 + 9
= 87 km/h
Time taken to travel remaining journey
= 696 ÷ 87
= 8 h
Time taken to travel the whole journey
= 8 + 3
= 11 h
(b)
11 h after 5.45 a.m. = 4.45 p.m.
Answer(s): (a) 11 h; (b) 4.45 p.m.