Hazel left home at 5.25 a.m. and drove towards the mountain which was 710 km away. For the first 248 km, she was travelling at 62 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 mountain?
(a)
Time taken to travel 248 km
= 248 ÷ 62
= 4 h
Distance of the remaining journey
= 710 - 248
= 462 km
Speed for remaining journey
= 62 + 4
= 66 km/h
Time taken to travel remaining journey
= 462 ÷ 66
= 7 h
Time taken to travel the whole journey
= 7 + 4
= 11 h
(b)
11 h after 5.25 a.m. = 4.25 p.m.
Answer(s): (a) 11 h; (b) 4.25 p.m.