A boat can move upstream at 46 kmph and downstream at 64 kmph, then the speed of the current is?
Choose the correct answer
A) 5	B) 6	C) 9	D) 4	E) 2
US = 46   DS = 64   M = (64 - 46)/2= 
<gadget id="calculator">(64 - 46)/2</gadget>
<output>9</output>
9 Answer:9
<result>C</result>
A boat can move upstream at 46 kmph and downstream at 64 kmph, then the speed of the current is?