Roshel left home at 8.50 a.m. and drove towards the mountain which was 974 km away. For the first 504 km, she was travelling at 84 km/h. Then she increased her speed by 10 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 504 km
= 504 ÷ 84
= 6 h
Distance of the remaining journey
= 974 - 504
= 470 km
Speed for remaining journey
= 84 + 10
= 94 km/h
Time taken to travel remaining journey
= 470 ÷ 94
= 5 h
Time taken to travel the whole journey
= 5 + 6
= 11 h
(b)
11 h after 8.50 a.m. = 7.50 p.m.
Answer(s): (a) 11 h; (b) 7.50 p.m.