Roshel left home at 7.30 a.m. and drove towards the mountain which was 896 km away. For the first 288 km, she was travelling at 72 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 288 km
= 288 ÷ 72
= 4 h
Distance of the remaining journey
= 896 - 288
= 608 km
Speed for remaining journey
= 72 + 4
= 76 km/h
Time taken to travel remaining journey
= 608 ÷ 76
= 8 h
Time taken to travel the whole journey
= 8 + 4
= 12 h
(b)
12 h after 7.30 a.m. = 7.30 p.m.
Answer(s): (a) 12 h; (b) 7.30 p.m.