Victoria left home at 5.20 a.m. and drove towards the city which was 870 km away. For the first 410 km, she was travelling at 82 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 410 km
= 410 ÷ 82
= 5 h
Distance of the remaining journey
= 870 - 410
= 460 km
Speed for remaining journey
= 82 + 10
= 92 km/h
Time taken to travel remaining journey
= 460 ÷ 92
= 5 h
Time taken to travel the whole journey
= 5 + 5
= 10 h
(b)
10 h after 5.20 a.m. = 3.20 p.m.
Answer(s): (a) 10 h; (b) 3.20 p.m.