Abi left home at 7.40 a.m. and drove towards the city which was 1020 km away. For the first 348 km, she was travelling at 87 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 city?
(a)
Time taken to travel 348 km
= 348 ÷ 87
= 4 h
Distance of the remaining journey
= 1020 - 348
= 672 km
Speed for remaining journey
= 87 + 9
= 96 km/h
Time taken to travel remaining journey
= 672 ÷ 96
= 7 h
Time taken to travel the whole journey
= 7 + 4
= 11 h
(b)
11 h after 7.40 a.m. = 6.40 p.m.
Answer(s): (a) 11 h; (b) 6.40 p.m.