An woman swims downstream 64 km and upstream 24 km taking 8 hours each time; what is the speed of the current? Select the correct option
A) 1.6
B) 1.8
C) 3.5
D) 1.5
E) 2.5
64 --- 8 DS = 8   ? ---- 1   24 ---- 8 US = 3   ? ---- 1 S = ?   S = (8 - 3)/2= 
<gadget id="calculator">(8 - 3)/2</gadget>
<output>5/2 = around 2.5</output>
2.5   Answer: 2.5
<result>E</result>
An woman swims downstream 64 km and upstream 24 km taking 8 hours each time; what is the speed of the current?