In this case, Murphy is <span>rowing to a place and come back so he was going 2x of the place distance. That means when he goes to the place the current velocity is helping him(5+1 kmph) and when he comes back the current velocity is slowing him(5-1kmph). To calculate the place distance, the calculation would be: X/6kmph + X/4kmph= 1 hour </span>X/6kmph + 1.5X/6kmph= 1 hour <span>2.5X/6kmph= 1hour 2.5X= 1 hour x 6km/ hour X= 6km/2.5 X= 2.4km </span>
