Xuan left home at 10.20 a.m. and drove towards the theme park which was 741 km away. For the first 237 km, she was travelling at 79 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 237 km
= 237 ÷ 79
= 3 h
Distance of the remaining journey
= 741 - 237
= 504 km
Speed for remaining journey
= 79 + 5
= 84 km/h
Time taken to travel remaining journey
= 504 ÷ 84
= 6 h
Time taken to travel the whole journey
= 6 + 3
= 9 h
(b)
9 h after 10.20 a.m. = 7.20 p.m.
Answer(s): (a) 9 h; (b) 7.20 p.m.