Nora left home at 5.35 a.m. and drove towards the mountain which was 790 km away. For the first 380 km, she was travelling at 76 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 380 km
= 380 ÷ 76
= 5 h
Distance of the remaining journey
= 790 - 380
= 410 km
Speed for remaining journey
= 76 + 6
= 82 km/h
Time taken to travel remaining journey
= 410 ÷ 82
= 5 h
Time taken to travel the whole journey
= 5 + 5
= 10 h
(b)
10 h after 5.35 a.m. = 3.35 p.m.
Answer(s): (a) 10 h; (b) 3.35 p.m.