Kimberly left home at 6.10 a.m. and drove towards the mountain which was 933 km away. For the first 498 km, she was travelling at 83 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 498 km
= 498 ÷ 83
= 6 h
Distance of the remaining journey
= 933 - 498
= 435 km
Speed for remaining journey
= 83 + 4
= 87 km/h
Time taken to travel remaining journey
= 435 ÷ 87
= 5 h
Time taken to travel the whole journey
= 5 + 6
= 11 h
(b)
11 h after 6.10 a.m. = 5.10 p.m.
Answer(s): (a) 11 h; (b) 5.10 p.m.