Question

A motor boat covers a distance of 60 km in 3/2 hours in down stream and it covers this distance upstream in 2 hours. The speed of motor boat in still water is 35km 1 h . find the speed of the stream.​

Answer 1

Step-by-step explanation:

Given, distance covered = 60 km

Time taken in downstream = 1.5 hour and time taken in upstream = 2 hour

Therefore, speed downstream =

1.5

60

=40km/h

and speed upstream =

2

60

=30km/h

We know that, speed of the stream =

2

1

(downstreamspeed−upstreamspeed)=

2

1

(40−30)=5km/h