Abi left home at 5.45 a.m. and drove towards the mountain which was 970 km away. For the first 510 km, she was travelling at 85 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 mountain?
(a)
Time taken to travel 510 km
= 510 ÷ 85
= 6 h
Distance of the remaining journey
= 970 - 510
= 460 km
Speed for remaining journey
= 85 + 7
= 92 km/h
Time taken to travel remaining journey
= 460 ÷ 92
= 5 h
Time taken to travel the whole journey
= 5 + 6
= 11 h
(b)
11 h after 5.45 a.m. = 4.45 p.m.
Answer(s): (a) 11 h; (b) 4.45 p.m.