Vanessa left home at 5.15 a.m. and drove towards the mountain which was 764 km away. For the first 444 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 444 km
= 444 ÷ 74
= 6 h
Distance of the remaining journey
= 764 - 444
= 320 km
Speed for remaining journey
= 74 + 6
= 80 km/h
Time taken to travel remaining journey
= 320 ÷ 80
= 4 h
Time taken to travel the whole journey
= 4 + 6
= 10 h
(b)
10 h after 5.15 a.m. = 3.15 p.m.
Answer(s): (a) 10 h; (b) 3.15 p.m.