Xuan left home at 10.35 a.m. and drove towards the airport which was 1086 km away. For the first 516 km, she was travelling at 86 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 516 km
= 516 ÷ 86
= 6 h
Distance of the remaining journey
= 1086 - 516
= 570 km
Speed for remaining journey
= 86 + 9
= 95 km/h
Time taken to travel remaining journey
= 570 ÷ 95
= 6 h
Time taken to travel the whole journey
= 6 + 6
= 12 h
(b)
12 h after 10.35 a.m. = 10.35 p.m.
Answer(s): (a) 12 h; (b) 10.35 p.m.