100 points if u solve its cbse 9th question
25. The distance between two stations is 200 km. A train travels for the first 100 km at a speed of
10 kmh-? How fast should the train travel the next 100 km so as to average 70 kmh-' for the
whole journey?
Answers
Answered by
5
Answer:
Time taken to travel first half distance = 100/ 50 = 2 hrs
Time is taken to travel second half distance = 100/v
Average speed = 200/ (2 + 100/v)
70 = 200/ (2 + 100/v)
2 + 100/v = 20/7
100/v = 20/7 – 2 = 6/7
v = 100 * 7/6 Km/h
v = 700/6 km/h
Explanation:
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Answered by
1
Answer:
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