The distance between Delhi and Agra is 200 km .A train travels the first 100 km at a speed of 50 km/h .How fast must the train travel the next 100 km so as to average 70 km/h for whole jurney ?
Answers
Answered by
1
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.
HOPE THIS WILL HELP YOU !! ❤️
Similar questions