Nora left home at 6.20 a.m. and drove towards the mountain which was 896 km away. For the first 528 km, she was travelling at 88 km/h. Then she increased her speed by 4 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 528 km
= 528 ÷ 88
= 6 h
Distance of the remaining journey
= 896 - 528
= 368 km
Speed for remaining journey
= 88 + 4
= 92 km/h
Time taken to travel remaining journey
= 368 ÷ 92
= 4 h
Time taken to travel the whole journey
= 4 + 6
= 10 h
(b)
10 h after 6.20 a.m. = 4.20 p.m.
Answer(s): (a) 10 h; (b) 4.20 p.m.