Gillian left home at 5.25 a.m. and drove towards the mountain which was 704 km away. For the first 272 km, she was travelling at 68 km/h. Then she increased her speed by 4 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 272 km
= 272 ÷ 68
= 4 h
Distance of the remaining journey
= 704 - 272
= 432 km
Speed for remaining journey
= 68 + 4
= 72 km/h
Time taken to travel remaining journey
= 432 ÷ 72
= 6 h
Time taken to travel the whole journey
= 6 + 4
= 10 h
(b)
10 h after 5.25 a.m. = 3.25 p.m.
Answer(s): (a) 10 h; (b) 3.25 p.m.