Sabrina left home at 8.10 a.m. and drove towards the airport which was 860 km away. For the first 332 km, she was travelling at 83 km/h. Then she increased her speed by 5 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 332 km
= 332 ÷ 83
= 4 h
Distance of the remaining journey
= 860 - 332
= 528 km
Speed for remaining journey
= 83 + 5
= 88 km/h
Time taken to travel remaining journey
= 528 ÷ 88
= 6 h
Time taken to travel the whole journey
= 6 + 4
= 10 h
(b)
10 h after 8.10 a.m. = 6.10 p.m.
Answer(s): (a) 10 h; (b) 6.10 p.m.