Natalie left home at 8.25 a.m. and drove towards the mountain which was 822 km away. For the first 360 km, she was travelling at 60 km/h. Then she increased her speed by 6 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 360 km
= 360 ÷ 60
= 6 h
Distance of the remaining journey
= 822 - 360
= 462 km
Speed for remaining journey
= 60 + 6
= 66 km/h
Time taken to travel remaining journey
= 462 ÷ 66
= 7 h
Time taken to travel the whole journey
= 7 + 6
= 13 h
(b)
13 h after 8.25 a.m. = 9.25 p.m.
Answer(s): (a) 13 h; (b) 9.25 p.m.