Zara left home at 6.45 a.m. and drove towards the theme park which was 672 km away. For the first 210 km, she was travelling at 70 km/h. Then she increased her speed by 7 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 210 km
= 210 ÷ 70
= 3 h
Distance of the remaining journey
= 672 - 210
= 462 km
Speed for remaining journey
= 70 + 7
= 77 km/h
Time taken to travel remaining journey
= 462 ÷ 77
= 6 h
Time taken to travel the whole journey
= 6 + 3
= 9 h
(b)
9 h after 6.45 a.m. = 3.45 p.m.
Answer(s): (a) 9 h; (b) 3.45 p.m.