Natalie left home at 8.25 a.m. and drove towards the mountain which was 855 km away. For the first 267 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 267 km
= 267 ÷ 89
= 3 h
Distance of the remaining journey
= 855 - 267
= 588 km
Speed for remaining journey
= 89 + 9
= 98 km/h
Time taken to travel remaining journey
= 588 ÷ 98
= 6 h
Time taken to travel the whole journey
= 6 + 3
= 9 h
(b)
9 h after 8.25 a.m. = 5.25 p.m.
Answer(s): (a) 9 h; (b) 5.25 p.m.