A boat goes 100 km downstream in 10 hours, and 60 m upstream in 15 hours. The speed of the stream is?
Choose the correct choice
A) 3  B) 22 1/4  C) 22 1/2  D) 22 1/1  E) 22 1/3
100 --- 10 DS = 10   ? ---- 1   60 ---- 15 US = 4   ? ----- 1 S = (10 - 4)/2= 
<gadget id="calculator">(10 - 4)/2</gadget>
<output>3</output>
3 kmp 3nswer: 3
<result>A</result>
A boat goes 100 km downstream in 10 hours, and 60 m upstream in 15 hours. The speed of the stream is?