Question

On a 60 kilometre track A train travels the first 30 kilometre with a uniform speed of 30 km per hour and the next 30 km with a uniform speed of 60 km per hour calculate average speed​

Answer 1

Answer:

Let the speed of the train for next 30 km be "x".

Since, t=

s

d

So, time taken by the train for first 30 km,

t

1

=

30km/h

30km

=1h

Time taken by the train to travel next 30 km:

t

2

=

xkm/h

30km

=(30/x)h

Time taken for the entire trip:

t=

4km/h

60km

=1.5h

So, 1+

x

30

=1.5

⇒x=60km/h

Explanation:

Hence, The answer is 60 km/h.Jun 7, 2018