Fiona left home at 6.10 a.m. and drove towards the mountain which was 1064 km away. For the first 432 km, she was travelling at 72 km/h. Then she increased her speed by 7 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 432 km
= 432 ÷ 72
= 6 h
Distance of the remaining journey
= 1064 - 432
= 632 km
Speed for remaining journey
= 72 + 7
= 79 km/h
Time taken to travel remaining journey
= 632 ÷ 79
= 8 h
Time taken to travel the whole journey
= 8 + 6
= 14 h
(b)
14 h after 6.10 a.m. = 8.10 p.m.
Answer(s): (a) 14 h; (b) 8.10 p.m.