The speed of a boat in upstream is 100 kmph and the speed of the boat downstream is 130 kmph. Find the speed of the boat in still water and the speed of the stream? Choose the correct choice from the following
A) 170, 10 kmph  B) 35, 27 kmph  C) 50, 60 kmph  D) 115, 15 kmph  E) 45, 65 kmph
Speed of the boat in still water = (100+130)/2= 
<gadget id="calculator">(100+130)/2</gadget>
<output>115</output>
115 kmph. Speed of the stream= (100-130)/2 = 15 kmph   ANSWER:115, 15 kmph
<result>D</result>
The speed of a boat in upstream is 100 kmph and the speed of the boat downstream is 130 kmph. Find the speed of the boat in still water and the speed of the stream?