Hazel left home at 6.40 a.m. and drove towards the theme park which was 857 km away. For the first 365 km, she was travelling at 73 km/h. Then she increased her speed by 9 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 365 km
= 365 ÷ 73
= 5 h
Distance of the remaining journey
= 857 - 365
= 492 km
Speed for remaining journey
= 73 + 9
= 82 km/h
Time taken to travel remaining journey
= 492 ÷ 82
= 6 h
Time taken to travel the whole journey
= 6 + 5
= 11 h
(b)
11 h after 6.40 a.m. = 5.40 p.m.
Answer(s): (a) 11 h; (b) 5.40 p.m.