A person P sitting on a wooden block (which does not move relative to water) in a flowing river sees two swimmers A & B. A & B both have constant speed vm relative to water. P observes that A starts from one point of the river bank & appears to move perpendicular to river flow. P also observes that B starts from some point on the other bank at the same time & moves downstream. the width of the river is d. and it flows with velocity vr . if A & B both reach a point at the same time, than find the initial separation between A & B.

A person P sitting on a wooden block (which does not move relative to water) in a flowing river sees two swimmers A & B. A & B both have constant speed vm relative to water. P observes that A starts from one point of the river bank & appears to move perpendicular to river flow. P also observes that B starts from some point on the other bank at the same time & moves downstream. the width of the river is d. and it flows with velocity vr . if A & B both reach a point at the same time, than find the initial separation between A & B.

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