Nicole left home at 6.15 a.m. and drove towards the city which was 970 km away. For the first 430 km, she was travelling at 86 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 city?
(a)
Time taken to travel 430 km
= 430 ÷ 86
= 5 h
Distance of the remaining journey
= 970 - 430
= 540 km
Speed for remaining journey
= 86 + 4
= 90 km/h
Time taken to travel remaining journey
= 540 ÷ 90
= 6 h
Time taken to travel the whole journey
= 6 + 5
= 11 h
(b)
11 h after 6.15 a.m. = 5.15 p.m.
Answer(s): (a) 11 h; (b) 5.15 p.m.