Linda left home at 6.10 a.m. and drove towards the city which was 821 km away. For the first 445 km, she was travelling at 89 km/h. Then she increased her speed by 5 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 445 km
= 445 ÷ 89
= 5 h
Distance of the remaining journey
= 821 - 445
= 376 km
Speed for remaining journey
= 89 + 5
= 94 km/h
Time taken to travel remaining journey
= 376 ÷ 94
= 4 h
Time taken to travel the whole journey
= 4 + 5
= 9 h
(b)
9 h after 6.10 a.m. = 3.10 p.m.
Answer(s): (a) 9 h; (b) 3.10 p.m.