numericals train travel from Delhi to Mumbai at the constant speed of 60 km and returned from Mumbai to Delhi at a speed of 80 kilometre per hour find the average speed of train
Answers
Answer:
let the distance be x
case1
speed=60km/hr
time = d/s
= x/60
case2
speed=80km/hr
time=d/s
=x/80
AVERAGE SPEED = Total distance
-------------------
total time
= 2x
-------------
x/60 + x/80
= 2× ÷ 7x/240
= 480/7 km/hr
ANS.......
Answer:
Explanation:
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
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