A boat goes 100 km downstream in 10 hours, and 75 m upstream in 15 hours. The speed of the stream is?  Answers:
A) 1 B) 2 C) 3 D) 4 E) 5
DS = 6   US = 4   S = ?   S = (6 - 4)/2= 
<gadget id="calculator">(6 - 4)/2</gadget>
<output>1</output>
1 kmph 1nswer: 1
<result>A</result>
A boat goes 100 km downstream in 10 hours, and 75 m upstream in 15 hours. The speed of the stream is?