two boats were going downstreamwithdifferent velocities.when one overtook the other a ring buoy had been dropped from one of the boats.sometime laterboth boats turned back simuntaneously and went at the same speed as before relative to water to the spot where ring buoy had been dropped.which of the boat reach first

Hi

They ll reach simultaneously, since They retrace their path with the same relative velocity and also , since the distance travelled by the slower boat is less than the distance travelled by fastr boat, so even if they have diff . vel , this accounts fr them being at the ring at the same time.

Let slow boat has rel vel v1 and faster has v2 . then resp distance are v1t and v2t in tike t. Hence the same time they ll take to come back at same vel to the same place.