Kimberly left home at 6.25 a.m. and drove towards the mountain which was 828 km away. For the first 258 km, she was travelling at 86 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 258 km
= 258 ÷ 86
= 3 h
Distance of the remaining journey
= 828 - 258
= 570 km
Speed for remaining journey
= 86 + 9
= 95 km/h
Time taken to travel remaining journey
= 570 ÷ 95
= 6 h
Time taken to travel the whole journey
= 6 + 3
= 9 h
(b)
9 h after 6.25 a.m. = 3.25 p.m.
Answer(s): (a) 9 h; (b) 3.25 p.m.