Tammy left home at 5.20 a.m. and drove towards the theme park which was 755 km away. For the first 355 km, she was travelling at 71 km/h. Then she increased her speed by 9 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 355 km
= 355 ÷ 71
= 5 h
Distance of the remaining journey
= 755 - 355
= 400 km
Speed for remaining journey
= 71 + 9
= 80 km/h
Time taken to travel remaining journey
= 400 ÷ 80
= 5 h
Time taken to travel the whole journey
= 5 + 5
= 10 h
(b)
10 h after 5.20 a.m. = 3.20 p.m.
Answer(s): (a) 10 h; (b) 3.20 p.m.