A train travels with a speed of 60km/h from station a to b and then covers back with a speed of 80km/h from station b to a. Find average speed ?
Answers
Answered by
0
Answer:
Let distance from A to B=x km= distance from B to A.
Time taken by train from A to B =
60
x
hr
Time taken by train from B to A =
80
x
hr
Total time taken by train =
60
x
+
80
x
=
240
7x
hr
average speed=
total time
total distance
=
240
7x
2x
=
7
480
km h
−1
Answered by
1
Explanation:
Let distance from A to B=x km= distance from B to A.
Time taken by train from A to B = x/60 hr
Time taken by train from B to A = x/80 hr
Total time taken by train = x/60+x/80 = 7x/240 hr
average speed= total time/total distance = 2x/(7x/240)
=480/77km/h
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