Min left home at 8.35 a.m. and drove towards the airport which was 714 km away. For the first 304 km, she was travelling at 76 km/h. Then she increased her speed by 6 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 304 km
= 304 ÷ 76
= 4 h
Distance of the remaining journey
= 714 - 304
= 410 km
Speed for remaining journey
= 76 + 6
= 82 km/h
Time taken to travel remaining journey
= 410 ÷ 82
= 5 h
Time taken to travel the whole journey
= 5 + 4
= 9 h
(b)
9 h after 8.35 a.m. = 5.35 p.m.
Answer(s): (a) 9 h; (b) 5.35 p.m.