Olivia left home at 9.45 a.m. and drove towards the theme park which was 1000 km away. For the first 405 km, she was travelling at 81 km/h. Then she increased her speed by 4 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 405 km
= 405 ÷ 81
= 5 h
Distance of the remaining journey
= 1000 - 405
= 595 km
Speed for remaining journey
= 81 + 4
= 85 km/h
Time taken to travel remaining journey
= 595 ÷ 85
= 7 h
Time taken to travel the whole journey
= 7 + 5
= 12 h
(b)
12 h after 9.45 a.m. = 9.45 p.m.
Answer(s): (a) 12 h; (b) 9.45 p.m.