The speed of a boat in upstream is 90 kmph and the speed of the boat downstream is 190 kmph. Find the speed of the boat in still water and the speed of the stream?	Choose the correct choice from the following options
A) 10 kmph	B) 76 kmph	C) 12 kmph	D) 97 kmph	E) 50 kmph
Speed of the boat in still water   = (90+190)/2= 
<gadget id="calculator">(90+190)/2</gadget>
<output>140</output>
140 kmph. Speed of the stream= (190-90)/2= 
<gadget id="calculator">(190-90)/2</gadget>
<output>50</output>
50 kmph.   Answer:50 kmph
<result>E</result>
The speed of a boat in upstream is 90 kmph and the speed of the boat downstream is 190 kmph. Find the speed of the boat in still water and the speed of the stream?