Gem left home at 9.30 a.m. and drove towards the theme park which was 611 km away. For the first 255 km, she was travelling at 85 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 theme park?
(a)
Time taken to travel 255 km
= 255 ÷ 85
= 3 h
Distance of the remaining journey
= 611 - 255
= 356 km
Speed for remaining journey
= 85 + 4
= 89 km/h
Time taken to travel remaining journey
= 356 ÷ 89
= 4 h
Time taken to travel the whole journey
= 4 + 3
= 7 h
(b)
7 h after 9.30 a.m. = 4.30 p.m.
Answer(s): (a) 7 h; (b) 4.30 p.m.