Penelope left home at 10.10 a.m. and drove towards the mountain which was 910 km away. For the first 522 km, she was travelling at 87 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 522 km
= 522 ÷ 87
= 6 h
Distance of the remaining journey
= 910 - 522
= 388 km
Speed for remaining journey
= 87 + 10
= 97 km/h
Time taken to travel remaining journey
= 388 ÷ 97
= 4 h
Time taken to travel the whole journey
= 4 + 6
= 10 h
(b)
10 h after 10.10 a.m. = 8.10 p.m.
Answer(s): (a) 10 h; (b) 8.10 p.m.