Tina left home at 6.20 a.m. and drove towards the mountain which was 589 km away. For the first 204 km, she was travelling at 68 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 204 km
= 204 ÷ 68
= 3 h
Distance of the remaining journey
= 589 - 204
= 385 km
Speed for remaining journey
= 68 + 9
= 77 km/h
Time taken to travel remaining journey
= 385 ÷ 77
= 5 h
Time taken to travel the whole journey
= 5 + 3
= 8 h
(b)
8 h after 6.20 a.m. = 2.20 p.m.
Answer(s): (a) 8 h; (b) 2.20 p.m.