Zoe left home at 7.20 a.m. and drove towards the theme park which was 1028 km away. For the first 316 km, she was travelling at 79 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 theme park?
(a)
Time taken to travel 316 km
= 316 ÷ 79
= 4 h
Distance of the remaining journey
= 1028 - 316
= 712 km
Speed for remaining journey
= 79 + 10
= 89 km/h
Time taken to travel remaining journey
= 712 ÷ 89
= 8 h
Time taken to travel the whole journey
= 8 + 4
= 12 h
(b)
12 h after 7.20 a.m. = 7.20 p.m.
Answer(s): (a) 12 h; (b) 7.20 p.m.