Dana left home at 9.45 a.m. and drove towards the theme park which was 785 km away. For the first 340 km, she was travelling at 85 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 340 km
= 340 ÷ 85
= 4 h
Distance of the remaining journey
= 785 - 340
= 445 km
Speed for remaining journey
= 85 + 4
= 89 km/h
Time taken to travel remaining journey
= 445 ÷ 89
= 5 h
Time taken to travel the whole journey
= 5 + 4
= 9 h
(b)
9 h after 9.45 a.m. = 6.45 p.m.
Answer(s): (a) 9 h; (b) 6.45 p.m.