Xylia left home at 6.10 a.m. and drove towards the airport which was 616 km away. For the first 320 km, she was travelling at 64 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 320 km
= 320 ÷ 64
= 5 h
Distance of the remaining journey
= 616 - 320
= 296 km
Speed for remaining journey
= 64 + 10
= 74 km/h
Time taken to travel remaining journey
= 296 ÷ 74
= 4 h
Time taken to travel the whole journey
= 4 + 5
= 9 h
(b)
9 h after 6.10 a.m. = 3.10 p.m.
Answer(s): (a) 9 h; (b) 3.10 p.m.