Erika left home at 10.15 a.m. and drove towards the theme park which was 751 km away. For the first 316 km, she was travelling at 79 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 316 km
= 316 ÷ 79
= 4 h
Distance of the remaining journey
= 751 - 316
= 435 km
Speed for remaining journey
= 79 + 8
= 87 km/h
Time taken to travel remaining journey
= 435 ÷ 87
= 5 h
Time taken to travel the whole journey
= 5 + 4
= 9 h
(b)
9 h after 10.15 a.m. = 7.15 p.m.
Answer(s): (a) 9 h; (b) 7.15 p.m.