Question

please give me correct answers i will mark your answer as brilliant​

Answer 1

Answer: 750m

Step-by-step explanation: Since he makes his strokes normal to the river current, the movement of the river will have no effect on the time of crossing the bank.  

The time will be, T=  

Speed

Distance

​

=  

4

1

​

hr=0.25hr=15min.

at the same time, he will go down by  

Distance=Speed x time=3km/hr x 0.25hr=0.75km=750m