Olivia left home at 5.40 a.m. and drove towards the mountain which was 812 km away. For the first 204 km, she was travelling at 68 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 mountain?
(a)
Time taken to travel 204 km
= 204 ÷ 68
= 3 h
Distance of the remaining journey
= 812 - 204
= 608 km
Speed for remaining journey
= 68 + 8
= 76 km/h
Time taken to travel remaining journey
= 608 ÷ 76
= 8 h
Time taken to travel the whole journey
= 8 + 3
= 11 h
(b)
11 h after 5.40 a.m. = 4.40 p.m.
Answer(s): (a) 11 h; (b) 4.40 p.m.