Gabby left home at 8.25 a.m. and drove towards the mountain which was 632 km away. For the first 296 km, she was travelling at 74 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 mountain?
(a)
Time taken to travel 296 km
= 296 ÷ 74
= 4 h
Distance of the remaining journey
= 632 - 296
= 336 km
Speed for remaining journey
= 74 + 10
= 84 km/h
Time taken to travel remaining journey
= 336 ÷ 84
= 4 h
Time taken to travel the whole journey
= 4 + 4
= 8 h
(b)
8 h after 8.25 a.m. = 4.25 p.m.
Answer(s): (a) 8 h; (b) 4.25 p.m.