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Speed of a boat in standing water is 9 k...

Speed of a boat in standing water is 9 kmph and the speed of the stream is 1.5 kmph. A man rows to a place at a distance of 105 km and comes back to the starting point. The total time taken by him is `16 hou r s` b. `18 hou r s` c. `20 hou r s` d. `24\ hou r s`

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Speed of a boat in standing water is 9 km/h and the speed of the stream is 1.5 kmIh. A man rows to a place at a distance of 105 km and comes back to the starting point. The total time taken by him is

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