Roshel left home at 9.20 a.m. and drove towards the airport which was 1017 km away. For the first 352 km, she was travelling at 88 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 352 km
= 352 ÷ 88
= 4 h
Distance of the remaining journey
= 1017 - 352
= 665 km
Speed for remaining journey
= 88 + 7
= 95 km/h
Time taken to travel remaining journey
= 665 ÷ 95
= 7 h
Time taken to travel the whole journey
= 7 + 4
= 11 h
(b)
11 h after 9.20 a.m. = 8.20 p.m.
Answer(s): (a) 11 h; (b) 8.20 p.m.