Tiffany left home at 5.35 a.m. and drove towards the airport which was 952 km away. For the first 336 km, she was travelling at 84 km/h. Then she increased her speed by 4 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 336 km
= 336 ÷ 84
= 4 h
Distance of the remaining journey
= 952 - 336
= 616 km
Speed for remaining journey
= 84 + 4
= 88 km/h
Time taken to travel remaining journey
= 616 ÷ 88
= 7 h
Time taken to travel the whole journey
= 7 + 4
= 11 h
(b)
11 h after 5.35 a.m. = 4.35 p.m.
Answer(s): (a) 11 h; (b) 4.35 p.m.