RBI Assistant Prelims 2016 Sitting 1 Paper

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Directions (51 -55) : What approximate value should come in place of the question mark (?) in the following questions? (Note: You are not expected to calculate the exact value.)
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Question : 63 of 99
 
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Total distance between A and B is d km. The distance travelled along the stream is three times of the total distance and the distance travelled against the stream is two times of the total distance. The time taken to cover distance along the stream is 10% less than the time taken to cover the distance against the stream. If a person covers a distance of 21 km in 1 hour 24 minutes along the stream, then find the rate of current?
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