Xuan left home at 9.20 a.m. and drove towards the theme park which was 878 km away. For the first 510 km, she was travelling at 85 km/h. Then she increased her speed by 7 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 510 km
= 510 ÷ 85
= 6 h
Distance of the remaining journey
= 878 - 510
= 368 km
Speed for remaining journey
= 85 + 7
= 92 km/h
Time taken to travel remaining journey
= 368 ÷ 92
= 4 h
Time taken to travel the whole journey
= 4 + 6
= 10 h
(b)
10 h after 9.20 a.m. = 7.20 p.m.
Answer(s): (a) 10 h; (b) 7.20 p.m.