Relative Motion · Motion in a plane – kinematics
A river of width 200 m is flowing from west to east with a speed of 18 km/h. A boat, moving with speed of 36 km/h in still water, is made to travel one-round trip (bank to bank of the river). Minimum time taken by the boat for this journey and also the displacement along the river bank are and respectively.
- (1)20 s and 100 m
- (2)40 s and 0 m
- (3)40 s and 200 m
- (4)40 s and 100 m
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