Abi left home at 10.20 a.m. and drove towards the mountain which was 837 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 mountain?
(a)
Time taken to travel 261 km
= 261 ÷ 87
= 3 h
Distance of the remaining journey
= 837 - 261
= 576 km
Speed for remaining journey
= 87 + 9
= 96 km/h
Time taken to travel remaining journey
= 576 ÷ 96
= 6 h
Time taken to travel the whole journey
= 6 + 3
= 9 h
(b)
9 h after 10.20 a.m. = 7.20 p.m.
Answer(s): (a) 9 h; (b) 7.20 p.m.