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A boat takes three times as long to cover a certain distance upstream as it takes to cover the same distance downstream. What is the ratio…

1658Medium DSSSB TGT Computer Science 0 replies 1 views

A boat takes three times as long to cover a certain distance upstream as it takes to cover the same distance downstream. What is the ratio of the speed of the boat in still water to the speed of the stream?

A2 : 1
B3 : 1
C3 : 2
D4 : 1

Correct answer: A

Explanation

Let the boat's speed be b and the stream's s; then b + s = 3(b − s), which gives b = 2s.

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