Question 142632
5/X=5/12
5X=60
X=60/5
X=12 MPH GOING UP STREAM.
5/Y=1/4
Y=20 MPH GOING DOWN STREAM.
(20-12)/2=8/2=4 MPH IN THE SPEED OF THE CURRENT.
20-4=16 MPH IS THE SPEED OF THE BOAT IN STILL WATER
12=4=16 DITTO.