Jen left home at 7.50 a.m. and drove towards the city which was 796 km away. For the first 336 km, she was travelling at 84 km/h. Then she increased her speed by 8 km/h and completed the remaining journey.
- How long did she take for her whole journey?
- At what time did she reach the city?
(a)
Time taken to travel 336 km
= 336 ÷ 84
= 4 h
Distance of the remaining journey
= 796 - 336
= 460 km
Speed for remaining journey
= 84 + 8
= 92 km/h
Time taken to travel remaining journey
= 460 ÷ 92
= 5 h
Time taken to travel the whole journey
= 5 + 4
= 9 h
(b)
9 h after 7.50 a.m. = 4.50 p.m.
Answer(s): (a) 9 h; (b) 4.50 p.m.