Abi left home at 10.45 a.m. and drove towards the mountain which was 498 km away. For the first 198 km, she was travelling at 66 km/h. Then she increased her speed by 9 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 198 km
= 198 ÷ 66
= 3 h
Distance of the remaining journey
= 498 - 198
= 300 km
Speed for remaining journey
= 66 + 9
= 75 km/h
Time taken to travel remaining journey
= 300 ÷ 75
= 4 h
Time taken to travel the whole journey
= 4 + 3
= 7 h
(b)
7 h after 10.45 a.m. = 5.45 p.m.
Answer(s): (a) 7 h; (b) 5.45 p.m.