Question 66037
60/(20-X)=100/(20+X)
100(20-X)=60(20+X)
2000-100X=1200+60X
-100X-60X=1200-2000
-160X=-800
X=-800/-160
X=5 MPH FOR THE CURRENT
PROOF
60/(20-5)=100/(20+5)
60/15=100/25
4=4