Olivia left home at 7.30 a.m. and drove towards the mountain which was 932 km away. For the first 492 km, she was travelling at 82 km/h. Then she increased her speed by 6 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 492 km
= 492 ÷ 82
= 6 h
Distance of the remaining journey
= 932 - 492
= 440 km
Speed for remaining journey
= 82 + 6
= 88 km/h
Time taken to travel remaining journey
= 440 ÷ 88
= 5 h
Time taken to travel the whole journey
= 5 + 6
= 11 h
(b)
11 h after 7.30 a.m. = 6.30 p.m.
Answer(s): (a) 11 h; (b) 6.30 p.m.