Julie left home at 6.30 a.m. and drove towards the airport which was 554 km away. For the first 189 km, she was travelling at 63 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 189 km
= 189 ÷ 63
= 3 h
Distance of the remaining journey
= 554 - 189
= 365 km
Speed for remaining journey
= 63 + 10
= 73 km/h
Time taken to travel remaining journey
= 365 ÷ 73
= 5 h
Time taken to travel the whole journey
= 5 + 3
= 8 h
(b)
8 h after 6.30 a.m. = 2.30 p.m.
Answer(s): (a) 8 h; (b) 2.30 p.m.