Elyse left home at 9.25 a.m. and drove towards the airport which was 1107 km away. For the first 435 km, she was travelling at 87 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 435 km
= 435 ÷ 87
= 5 h
Distance of the remaining journey
= 1107 - 435
= 672 km
Speed for remaining journey
= 87 + 9
= 96 km/h
Time taken to travel remaining journey
= 672 ÷ 96
= 7 h
Time taken to travel the whole journey
= 7 + 5
= 12 h
(b)
12 h after 9.25 a.m. = 9.25 p.m.
Answer(s): (a) 12 h; (b) 9.25 p.m.