Abi left home at 5.20 a.m. and drove towards the city which was 798 km away. For the first 430 km, she was travelling at 86 km/h. Then she increased her speed by 6 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 430 km
= 430 ÷ 86
= 5 h
Distance of the remaining journey
= 798 - 430
= 368 km
Speed for remaining journey
= 86 + 6
= 92 km/h
Time taken to travel remaining journey
= 368 ÷ 92
= 4 h
Time taken to travel the whole journey
= 4 + 5
= 9 h
(b)
9 h after 5.20 a.m. = 2.20 p.m.
Answer(s): (a) 9 h; (b) 2.20 p.m.