Shiyun left home at 6.15 a.m. and drove towards the airport which was 976 km away. For the first 304 km, she was travelling at 76 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 304 km
= 304 ÷ 76
= 4 h
Distance of the remaining journey
= 976 - 304
= 672 km
Speed for remaining journey
= 76 + 8
= 84 km/h
Time taken to travel remaining journey
= 672 ÷ 84
= 8 h
Time taken to travel the whole journey
= 8 + 4
= 12 h
(b)
12 h after 6.15 a.m. = 6.15 p.m.
Answer(s): (a) 12 h; (b) 6.15 p.m.