Jaslyn left home at 8.50 a.m. and drove towards the city which was 880 km away. For the first 516 km, she was travelling at 86 km/h. Then she increased her speed by 5 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 516 km
= 516 ÷ 86
= 6 h
Distance of the remaining journey
= 880 - 516
= 364 km
Speed for remaining journey
= 86 + 5
= 91 km/h
Time taken to travel remaining journey
= 364 ÷ 91
= 4 h
Time taken to travel the whole journey
= 4 + 6
= 10 h
(b)
10 h after 8.50 a.m. = 6.50 p.m.
Answer(s): (a) 10 h; (b) 6.50 p.m.