Victoria left home at 10.35 a.m. and drove towards the mountain which was 683 km away. For the first 243 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 mountain?
(a)
Time taken to travel 243 km
= 243 ÷ 81
= 3 h
Distance of the remaining journey
= 683 - 243
= 440 km
Speed for remaining journey
= 81 + 7
= 88 km/h
Time taken to travel remaining journey
= 440 ÷ 88
= 5 h
Time taken to travel the whole journey
= 5 + 3
= 8 h
(b)
8 h after 10.35 a.m. = 6.35 p.m.
Answer(s): (a) 8 h; (b) 6.35 p.m.