Question

A man can row 6 km/hr in still water.It takes him twice as long as to row up and to row down the river . Find the rate of the stream

Answer 1

Answer:

Step-by-step explanation:

Ans: 2 km/hr

Time upstream : time downstream =2:1=2:1

Speed is inversely proportional to time for a given distance and therefore,

speed upstream : speed downstream =1:2=1:2

Let speed upstream =x=x

Speed downstream =2x

Speed in still water =1/2(x+2x) = 3x/2

3x/2=6

x=4

Speed upstream =x=4

Speed downstream =2x=8

Rate of stream =1/2(8−4)=2