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1. A man swims downstream 72 km and upstream 45 km taking 9 hours each time. what is the speed of the current?

2. A boat can row upstream at 25 kmph and downstream at 35 kmph, then the speed of the current is?

3. The speed of a boat in still water is 15 km/hr and the rate of current is 3 km/hr the distance travelled downstream in 12 minutes is :

4. A man can row his boat with the stream at 6 km/h and against the stream in 4 km/h. The man's rate is?

5. A man can row upstream at 8kmph and downstream at 13 kmph. The speed of the stream is

6. A man can swim in still water at 4.5 km/h, but takes twice as long to swim upstream than downstream. The speed of the stream is?

7. A man can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 1 hour to row to a plce and come back, how far is the place?

8. A man's speed with the current is 15 km / hr and the speed of the current is 2.5 km / hr. The man's speed against the current is

9. A man can row with a speed of 15 kmph in still water. If the stream flows at 5 kmph, then the speed in downstream is?

10. A man swims downstream 30 km and upstream 18 km taking 3 hours each time, what is the speed of the man in still water?