Penelope left home at 5.45 a.m. and drove towards the mountain which was 1160 km away. For the first 480 km, she was travelling at 80 km/h. Then she increased her speed by 5 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 480 km
= 480 ÷ 80
= 6 h
Distance of the remaining journey
= 1160 - 480
= 680 km
Speed for remaining journey
= 80 + 5
= 85 km/h
Time taken to travel remaining journey
= 680 ÷ 85
= 8 h
Time taken to travel the whole journey
= 8 + 6
= 14 h
(b)
14 h after 5.45 a.m. = 7.45 p.m.
Answer(s): (a) 14 h; (b) 7.45 p.m.