Wendy left home at 6.10 a.m. and drove towards the airport which was 984 km away. For the first 438 km, she was travelling at 73 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 438 km
= 438 ÷ 73
= 6 h
Distance of the remaining journey
= 984 - 438
= 546 km
Speed for remaining journey
= 73 + 5
= 78 km/h
Time taken to travel remaining journey
= 546 ÷ 78
= 7 h
Time taken to travel the whole journey
= 7 + 6
= 13 h
(b)
13 h after 6.10 a.m. = 7.10 p.m.
Answer(s): (a) 13 h; (b) 7.10 p.m.