Cathy left home at 6.45 a.m. and drove towards the mountain which was 1098 km away. For the first 534 km, she was travelling at 89 km/h. Then she increased her speed by 5 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 534 km
= 534 ÷ 89
= 6 h
Distance of the remaining journey
= 1098 - 534
= 564 km
Speed for remaining journey
= 89 + 5
= 94 km/h
Time taken to travel remaining journey
= 564 ÷ 94
= 6 h
Time taken to travel the whole journey
= 6 + 6
= 12 h
(b)
12 h after 6.45 a.m. = 6.45 p.m.
Answer(s): (a) 12 h; (b) 6.45 p.m.