Jen left home at 7.15 a.m. and drove towards the theme park which was 734 km away. For the first 320 km, she was travelling at 64 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 theme park?
(a)
Time taken to travel 320 km
= 320 ÷ 64
= 5 h
Distance of the remaining journey
= 734 - 320
= 414 km
Speed for remaining journey
= 64 + 5
= 69 km/h
Time taken to travel remaining journey
= 414 ÷ 69
= 6 h
Time taken to travel the whole journey
= 6 + 5
= 11 h
(b)
11 h after 7.15 a.m. = 6.15 p.m.
Answer(s): (a) 11 h; (b) 6.15 p.m.