- A3 : 2
- B5 : 4
- C6 : 5
- D2 : 1
Step-by-Step Solution
Take boat = 5, stream = . Downstream = 6, upstream = 4, so the ratio is .
Answer: A) 3 : 2
The ratio of a boat's speed in still water to the speed of the stream is 5 : 1. What is the ratio of its downstream speed to its upstream speed?
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