Question

Rama traveled from a to b at 60 kmph and comes back from b to a at 40 kmph what is his average speed

Answer 1

the average speed and of 20 kmph

Answer 2

Answer:

Step-by-step explanation:

since equal distances are covered at 60 kmph and 40 kmph, we can apply the formula 2xy/(x+y)

Average speed=

2

×

40

×

60

40

+

60

= 48 kmph

This formula works as follows

Let the distance to one side = x

Total distance = 2x

Time taken for the forward journey =

x

60

Time taken for the return journey =

x

40

Total time =

x

60

+

x

40

=

100

x

2400

Average speed =

Total distance

Total Time

=

2

x

(

100

x

2400

)

= 48 kmph...