Rachel left home at 9.35 a.m. and drove towards the city which was 1029 km away. For the first 261 km, she was travelling at 87 km/h. Then she increased her speed by 9 km/h and completed the remaining journey.
- How long did she take for her whole journey?
- At what time did she reach the city?
(a)
Time taken to travel 261 km
= 261 ÷ 87
= 3 h
Distance of the remaining journey
= 1029 - 261
= 768 km
Speed for remaining journey
= 87 + 9
= 96 km/h
Time taken to travel remaining journey
= 768 ÷ 96
= 8 h
Time taken to travel the whole journey
= 8 + 3
= 11 h
(b)
11 h after 9.35 a.m. = 8.35 p.m.
Answer(s): (a) 11 h; (b) 8.35 p.m.