<PRE><B>Question 391975</B>
10W  flows at rate = (1/2) x  5W
15W  flows at rate = (1/2) x  10W
20 W  flows at rate = (1/2) x 15W
-------------------------
I can rewrite this data as:
(1) 5W flows at 2 x 10W
(2) 10W flows at 2 x 15W
(3) 15W flows at 2 x 20W
--------------------
I can combine (1) and (2) to say
5W flows at 2 x (2 x 15W) = 4 x 15W
--------------------
Now I can combine this result with (3)
5W flows at rate 4 x (2 x 20W) = 8 x 20W
--------------------
So, 5W flows 8 times as fast as 20W</PRE>