Question

ravi travelled 40 km upstream. if his speed in still water was 3km/hr. less and the speed of the stream was 3 km/hr. more, he would have taken 6hrs. more for the trip. find the time taken for the upstream trip​

Answer 1

Answer:

You will not be able to see any other part of the river.

Explanation:

The speed is 3 km/hr for both the stream and the Ravi. So the river will end up in the sea and Ravi will be able to see only one part of the river.

Answer 2

Answer:

Speed of the stream =3km/hr

Upstream time = 6hrs

Downstream time = 4hrs

Let the distance between the two parts be x km

Down speed stream=x/4 km/hr

Upstream speed= x/6km/hr

Speed of stream=1/2(x/4-x/6)

=1/2(3x-2x)/12

=x/24

Speed of stream =x/24 =3x =72km

∴ Distance is 72km