Min left home at 10.35 a.m. and drove towards the airport which was 1100 km away. For the first 340 km, she was travelling at 85 km/h. Then she increased her speed by 10 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 340 km
= 340 ÷ 85
= 4 h
Distance of the remaining journey
= 1100 - 340
= 760 km
Speed for remaining journey
= 85 + 10
= 95 km/h
Time taken to travel remaining journey
= 760 ÷ 95
= 8 h
Time taken to travel the whole journey
= 8 + 4
= 12 h
(b)
12 h after 10.35 a.m. = 10.35 p.m.
Answer(s): (a) 12 h; (b) 10.35 p.m.