Nicole left home at 8.20 a.m. and drove towards the mountain which was 846 km away. For the first 356 km, she was travelling at 89 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 356 km
= 356 ÷ 89
= 4 h
Distance of the remaining journey
= 846 - 356
= 490 km
Speed for remaining journey
= 89 + 9
= 98 km/h
Time taken to travel remaining journey
= 490 ÷ 98
= 5 h
Time taken to travel the whole journey
= 5 + 4
= 9 h
(b)
9 h after 8.20 a.m. = 5.20 p.m.
Answer(s): (a) 9 h; (b) 5.20 p.m.