Emma left home at 9.20 a.m. and drove towards the mountain which was 1068 km away. For the first 516 km, she was travelling at 86 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 516 km
= 516 ÷ 86
= 6 h
Distance of the remaining journey
= 1068 - 516
= 552 km
Speed for remaining journey
= 86 + 6
= 92 km/h
Time taken to travel remaining journey
= 552 ÷ 92
= 6 h
Time taken to travel the whole journey
= 6 + 6
= 12 h
(b)
12 h after 9.20 a.m. = 9.20 p.m.
Answer(s): (a) 12 h; (b) 9.20 p.m.