Question

Rishika travel between two station A to B with speed 50 km/hr and come back B to A With speed of 60 km/hr . Find its average speed​

Answer 1

Answer:

average speed =total distance /total time

avg speed =2v1v2/v1+V2

and

avg speed = (2×50×60)/(50+60) = 54.54 kmhr

Answer 2

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