Question 220956
D=RT 
(15+15)=[(10-X)*(10+X)]4
30=[100-X^2]4
30=400-4X^2
4X^2=400-30
4X^2=370
X^2=370/4
X^2=92.5
X=SQRT92.5
X=9.617 MPH FOR THE CURRENT.
PROOF:
(15+15)=[(10-9.617)+(10+9.617)]4
30=[.383*19.617)4
30=7.51.4*4
30=30