Sarah left home at 6.30 a.m. and drove towards the theme park which was 796 km away. For the first 222 km, she was travelling at 74 km/h. Then she increased her speed by 8 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 222 km
= 222 ÷ 74
= 3 h
Distance of the remaining journey
= 796 - 222
= 574 km
Speed for remaining journey
= 74 + 8
= 82 km/h
Time taken to travel remaining journey
= 574 ÷ 82
= 7 h
Time taken to travel the whole journey
= 7 + 3
= 10 h
(b)
10 h after 6.30 a.m. = 4.30 p.m.
Answer(s): (a) 10 h; (b) 4.30 p.m.