Kathy left home at 8.10 a.m. and drove towards the mountain which was 590 km away. For the first 246 km, she was travelling at 82 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 246 km
= 246 ÷ 82
= 3 h
Distance of the remaining journey
= 590 - 246
= 344 km
Speed for remaining journey
= 82 + 4
= 86 km/h
Time taken to travel remaining journey
= 344 ÷ 86
= 4 h
Time taken to travel the whole journey
= 4 + 3
= 7 h
(b)
7 h after 8.10 a.m. = 3.10 p.m.
Answer(s): (a) 7 h; (b) 3.10 p.m.