Anna left home at 6.50 a.m. and drove towards the mountain which was 682 km away. For the first 390 km, she was travelling at 65 km/h. Then she increased her speed by 8 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 390 km
= 390 ÷ 65
= 6 h
Distance of the remaining journey
= 682 - 390
= 292 km
Speed for remaining journey
= 65 + 8
= 73 km/h
Time taken to travel remaining journey
= 292 ÷ 73
= 4 h
Time taken to travel the whole journey
= 4 + 6
= 10 h
(b)
10 h after 6.50 a.m. = 4.50 p.m.
Answer(s): (a) 10 h; (b) 4.50 p.m.