Sarah left home at 7.20 a.m. and drove towards the theme park which was 936 km away. For the first 360 km, she was travelling at 90 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 theme park?
(a)
Time taken to travel 360 km
= 360 ÷ 90
= 4 h
Distance of the remaining journey
= 936 - 360
= 576 km
Speed for remaining journey
= 90 + 6
= 96 km/h
Time taken to travel remaining journey
= 576 ÷ 96
= 6 h
Time taken to travel the whole journey
= 6 + 4
= 10 h
(b)
10 h after 7.20 a.m. = 5.20 p.m.
Answer(s): (a) 10 h; (b) 5.20 p.m.