Elyse left home at 5.45 a.m. and drove towards the mountain which was 862 km away. For the first 246 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 246 km
= 246 ÷ 82
= 3 h
Distance of the remaining journey
= 862 - 246
= 616 km
Speed for remaining journey
= 82 + 6
= 88 km/h
Time taken to travel remaining journey
= 616 ÷ 88
= 7 h
Time taken to travel the whole journey
= 7 + 3
= 10 h
(b)
10 h after 5.45 a.m. = 3.45 p.m.
Answer(s): (a) 10 h; (b) 3.45 p.m.