Sabrina left home at 9.25 a.m. and drove towards the city which was 736 km away. For the first 280 km, she was travelling at 70 km/h. Then she increased her speed by 6 km/h and completed the remaining journey.
- How long did she take for her whole journey?
- At what time did she reach the city?
(a)
Time taken to travel 280 km
= 280 ÷ 70
= 4 h
Distance of the remaining journey
= 736 - 280
= 456 km
Speed for remaining journey
= 70 + 6
= 76 km/h
Time taken to travel remaining journey
= 456 ÷ 76
= 6 h
Time taken to travel the whole journey
= 6 + 4
= 10 h
(b)
10 h after 9.25 a.m. = 7.25 p.m.
Answer(s): (a) 10 h; (b) 7.25 p.m.