Usha left home at 9.25 a.m. and drove towards the mountain which was 1057 km away. For the first 385 km, she was travelling at 77 km/h. Then she increased her speed by 7 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 385 km
= 385 ÷ 77
= 5 h
Distance of the remaining journey
= 1057 - 385
= 672 km
Speed for remaining journey
= 77 + 7
= 84 km/h
Time taken to travel remaining journey
= 672 ÷ 84
= 8 h
Time taken to travel the whole journey
= 8 + 5
= 13 h
(b)
13 h after 9.25 a.m. = 10.25 p.m.
Answer(s): (a) 13 h; (b) 10.25 p.m.