It takes twice as long for a man to row against the current as it does to row in the other direction. The following is the ratio of the boat's speed (in calm water) to the stream's speed:
A. 2 : 1
B. 3 : 1
C. 3 : 2
D. 4 : 3
Answer:B
It takes twice as long for a man to row against the current as it does to row in the other direction. The following is the ratio of the boat's speed (in calm water) to the stream's speed:
A. 2 : 1 B. 3 : 1 C. 3 : 2 D. 4 : 3
Explanation: Let's say man's upstream speed is x kmph.Then his downstream rate equals 2x kmph.(Speed of stream) = 2x + x/2 : 2x -x/2 (Speed in calm water)= 3x/2 : x/2= 3 to 1.