A boat can move upstream at 25 kmph and downstream at 37 kmph, then the speed of the current is?	Choose the correct option:	A) 5 kmph	B) 7 kmph	C) 8 kmph	D) 6 kmph	E) 4 kmph
US = 25   6 kmphS = 37   M = (37 - 25)/2= 
<gadget id="calculator">(37 - 25)/2</gadget>
<output>6</output>
6   Answer:6 kmph
<result>D</result>
A boat can move upstream at 25 kmph and downstream at 37 kmph, then the speed of the current is?