Pamela left home at 8.25 a.m. and drove towards the airport which was 772 km away. For the first 402 km, she was travelling at 67 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 airport?
(a)
Time taken to travel 402 km
= 402 ÷ 67
= 6 h
Distance of the remaining journey
= 772 - 402
= 370 km
Speed for remaining journey
= 67 + 7
= 74 km/h
Time taken to travel remaining journey
= 370 ÷ 74
= 5 h
Time taken to travel the whole journey
= 5 + 6
= 11 h
(b)
11 h after 8.25 a.m. = 7.25 p.m.
Answer(s): (a) 11 h; (b) 7.25 p.m.