Victoria left home at 9.50 a.m. and drove towards the airport which was 740 km away. For the first 400 km, she was travelling at 80 km/h. Then she increased her speed by 5 km/h and completed the remaining journey.
- How long did she take for her whole journey?
- At what time did she reach the airport?
(a)
Time taken to travel 400 km
= 400 ÷ 80
= 5 h
Distance of the remaining journey
= 740 - 400
= 340 km
Speed for remaining journey
= 80 + 5
= 85 km/h
Time taken to travel remaining journey
= 340 ÷ 85
= 4 h
Time taken to travel the whole journey
= 4 + 5
= 9 h
(b)
9 h after 9.50 a.m. = 6.50 p.m.
Answer(s): (a) 9 h; (b) 6.50 p.m.