Raeann left home at 6.35 a.m. and drove towards the airport which was 1002 km away. For the first 370 km, she was travelling at 74 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 370 km
= 370 ÷ 74
= 5 h
Distance of the remaining journey
= 1002 - 370
= 632 km
Speed for remaining journey
= 74 + 5
= 79 km/h
Time taken to travel remaining journey
= 632 ÷ 79
= 8 h
Time taken to travel the whole journey
= 8 + 5
= 13 h
(b)
13 h after 6.35 a.m. = 7.35 p.m.
Answer(s): (a) 13 h; (b) 7.35 p.m.