Diana left home at 10.10 a.m. and drove towards the city which was 865 km away. For the first 450 km, she was travelling at 75 km/h. Then she increased her speed by 8 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 450 km
= 450 ÷ 75
= 6 h
Distance of the remaining journey
= 865 - 450
= 415 km
Speed for remaining journey
= 75 + 8
= 83 km/h
Time taken to travel remaining journey
= 415 ÷ 83
= 5 h
Time taken to travel the whole journey
= 5 + 6
= 11 h
(b)
11 h after 10.10 a.m. = 9.10 p.m.
Answer(s): (a) 11 h; (b) 9.10 p.m.