Barbara left home at 6.50 a.m. and drove towards the theme park which was 906 km away. For the first 402 km, she was travelling at 67 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 402 km
= 402 ÷ 67
= 6 h
Distance of the remaining journey
= 906 - 402
= 504 km
Speed for remaining journey
= 67 + 5
= 72 km/h
Time taken to travel remaining journey
= 504 ÷ 72
= 7 h
Time taken to travel the whole journey
= 7 + 6
= 13 h
(b)
13 h after 6.50 a.m. = 7.50 p.m.
Answer(s): (a) 13 h; (b) 7.50 p.m.