Question 30684
Let the speed of the current be x
SPeed with the water -->24+x
Speed aginst the water --->24-x
Equation:
*[tex \frac{90}{24+x}=\frac{54}{24-x}]
<pre>Cross multiply <b>
54(24+x)=90(24-x)
1296+54x=2160-90x
144x=864
x=6


<font color = red>Hence, the speed of the current is 6mph.</font>
Paul.