Pamela left home at 9.35 a.m. and drove towards the airport which was 490 km away. For the first 198 km, she was travelling at 66 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 198 km
= 198 ÷ 66
= 3 h
Distance of the remaining journey
= 490 - 198
= 292 km
Speed for remaining journey
= 66 + 7
= 73 km/h
Time taken to travel remaining journey
= 292 ÷ 73
= 4 h
Time taken to travel the whole journey
= 4 + 3
= 7 h
(b)
7 h after 9.35 a.m. = 4.35 p.m.
Answer(s): (a) 7 h; (b) 4.35 p.m.