Question 58777
12/(15+X)=9/(15-X)
9(15+X)=12(15-X)
135+9X=180-12X
9X+12X=180-135
21X=45
X=45/21
X=2.14 MPH IS THE SPEED OF THE WATER
PROOF
12/(15+2.14)=9/(15-2.14)
12/17.14=9/12.86
.7=.7