Gwen left home at 5.35 a.m. and drove towards the theme park which was 1016 km away. For the first 312 km, she was travelling at 78 km/h. Then she increased her speed by 10 km/h and completed the remaining journey.
- How long did she take for her whole journey?
- At what time did she reach the theme park?
(a)
Time taken to travel 312 km
= 312 ÷ 78
= 4 h
Distance of the remaining journey
= 1016 - 312
= 704 km
Speed for remaining journey
= 78 + 10
= 88 km/h
Time taken to travel remaining journey
= 704 ÷ 88
= 8 h
Time taken to travel the whole journey
= 8 + 4
= 12 h
(b)
12 h after 5.35 a.m. = 5.35 p.m.
Answer(s): (a) 12 h; (b) 5.35 p.m.