Dana left home at 7.45 a.m. and drove towards the city which was 1176 km away. For the first 440 km, she was travelling at 88 km/h. Then she increased her speed by 4 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 440 km
= 440 ÷ 88
= 5 h
Distance of the remaining journey
= 1176 - 440
= 736 km
Speed for remaining journey
= 88 + 4
= 92 km/h
Time taken to travel remaining journey
= 736 ÷ 92
= 8 h
Time taken to travel the whole journey
= 8 + 5
= 13 h
(b)
13 h after 7.45 a.m. = 8.45 p.m.
Answer(s): (a) 13 h; (b) 8.45 p.m.