Ivory left home at 6.20 a.m. and drove towards the mountain which was 942 km away. For the first 246 km, she was travelling at 82 km/h. Then she increased her speed by 5 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 246 km
= 246 ÷ 82
= 3 h
Distance of the remaining journey
= 942 - 246
= 696 km
Speed for remaining journey
= 82 + 5
= 87 km/h
Time taken to travel remaining journey
= 696 ÷ 87
= 8 h
Time taken to travel the whole journey
= 8 + 3
= 11 h
(b)
11 h after 6.20 a.m. = 5.20 p.m.
Answer(s): (a) 11 h; (b) 5.20 p.m.