Dana left home at 8.25 a.m. and drove towards the mountain which was 1010 km away. For the first 370 km, she was travelling at 74 km/h. Then she increased her speed by 6 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 370 km
= 370 ÷ 74
= 5 h
Distance of the remaining journey
= 1010 - 370
= 640 km
Speed for remaining journey
= 74 + 6
= 80 km/h
Time taken to travel remaining journey
= 640 ÷ 80
= 8 h
Time taken to travel the whole journey
= 8 + 5
= 13 h
(b)
13 h after 8.25 a.m. = 9.25 p.m.
Answer(s): (a) 13 h; (b) 9.25 p.m.