Nicole left home at 6.45 a.m. and drove towards the mountain which was 705 km away. For the first 360 km, she was travelling at 60 km/h. Then she increased her speed by 9 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 360 km
= 360 ÷ 60
= 6 h
Distance of the remaining journey
= 705 - 360
= 345 km
Speed for remaining journey
= 60 + 9
= 69 km/h
Time taken to travel remaining journey
= 345 ÷ 69
= 5 h
Time taken to travel the whole journey
= 5 + 6
= 11 h
(b)
11 h after 6.45 a.m. = 5.45 p.m.
Answer(s): (a) 11 h; (b) 5.45 p.m.