Victoria left home at 6.30 a.m. and drove towards the city which was 1135 km away. For the first 415 km, she was travelling at 83 km/h. Then she increased her speed by 7 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 415 km
= 415 ÷ 83
= 5 h
Distance of the remaining journey
= 1135 - 415
= 720 km
Speed for remaining journey
= 83 + 7
= 90 km/h
Time taken to travel remaining journey
= 720 ÷ 90
= 8 h
Time taken to travel the whole journey
= 8 + 5
= 13 h
(b)
13 h after 6.30 a.m. = 7.30 p.m.
Answer(s): (a) 13 h; (b) 7.30 p.m.