Kylie left home at 8.50 a.m. and drove towards the city which was 686 km away. For the first 260 km, she was travelling at 65 km/h. Then she increased her speed by 6 km/h and completed the remaining journey.
- How long did she take for her whole journey?
- At what time did she reach the city?
(a)
Time taken to travel 260 km
= 260 ÷ 65
= 4 h
Distance of the remaining journey
= 686 - 260
= 426 km
Speed for remaining journey
= 65 + 6
= 71 km/h
Time taken to travel remaining journey
= 426 ÷ 71
= 6 h
Time taken to travel the whole journey
= 6 + 4
= 10 h
(b)
10 h after 8.50 a.m. = 6.50 p.m.
Answer(s): (a) 10 h; (b) 6.50 p.m.