Eva left home at 7.20 a.m. and drove towards the airport which was 536 km away. For the first 248 km, she was travelling at 62 km/h. Then she increased her speed by 10 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 248 km
= 248 ÷ 62
= 4 h
Distance of the remaining journey
= 536 - 248
= 288 km
Speed for remaining journey
= 62 + 10
= 72 km/h
Time taken to travel remaining journey
= 288 ÷ 72
= 4 h
Time taken to travel the whole journey
= 4 + 4
= 8 h
(b)
8 h after 7.20 a.m. = 3.20 p.m.
Answer(s): (a) 8 h; (b) 3.20 p.m.