Xylia left home at 8.50 a.m. and drove towards the airport which was 710 km away. For the first 335 km, she was travelling at 67 km/h. Then she increased her speed by 8 km/h and completed the remaining journey.
- How long did she take for her whole journey?
- At what time did she reach the airport?
(a)
Time taken to travel 335 km
= 335 ÷ 67
= 5 h
Distance of the remaining journey
= 710 - 335
= 375 km
Speed for remaining journey
= 67 + 8
= 75 km/h
Time taken to travel remaining journey
= 375 ÷ 75
= 5 h
Time taken to travel the whole journey
= 5 + 5
= 10 h
(b)
10 h after 8.50 a.m. = 6.50 p.m.
Answer(s): (a) 10 h; (b) 6.50 p.m.