A boy can cover triple distance when swimming with the stream in a definite time period than against the stream. If speed of stream is 3km/hr, what will be speed of boy in still water?
Answer & explanation
Correct answer: option 1
Downstream(D.S) : Upstream (U.S)
Speed: 3 : 1
Boy : Stream= \(\frac{3\;+\;1}{2}\) : \(\frac{3\;-\;1}{2}\) = 2 : 1
Here,
1R = 3 km/hr (given)
Therefore, speed of Boy = 2 x 3 = 6 km/hr