Lynn left home at 6.20 a.m. and drove towards the city which was 1190 km away. For the first 486 km, she was travelling at 81 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 city?
(a)
Time taken to travel 486 km
= 486 ÷ 81
= 6 h
Distance of the remaining journey
= 1190 - 486
= 704 km
Speed for remaining journey
= 81 + 7
= 88 km/h
Time taken to travel remaining journey
= 704 ÷ 88
= 8 h
Time taken to travel the whole journey
= 8 + 6
= 14 h
(b)
14 h after 6.20 a.m. = 8.20 p.m.
Answer(s): (a) 14 h; (b) 8.20 p.m.