Ivory left home at 5.45 a.m. and drove towards the city which was 792 km away. For the first 366 km, she was travelling at 61 km/h. Then she increased her speed by 10 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 366 km
= 366 ÷ 61
= 6 h
Distance of the remaining journey
= 792 - 366
= 426 km
Speed for remaining journey
= 61 + 10
= 71 km/h
Time taken to travel remaining journey
= 426 ÷ 71
= 6 h
Time taken to travel the whole journey
= 6 + 6
= 12 h
(b)
12 h after 5.45 a.m. = 5.45 p.m.
Answer(s): (a) 12 h; (b) 5.45 p.m.