A boat running downstream covers a distance of 22 km in 4 hours while for covering the same distance upstream, it takes 5 hours. What is the speed of the boat in still water?
Options:
A) 5 kmph B) 4 kmph C) 4.75 kmph D) 4.95 kmph E) 4.65 kmph
Speed 4.95 kmphownstream = 22/4= 
<gadget id="calculator">22/4</gadget>
<output>11/2 = around 5.5</output>
5.5 kmph   Speed Upstream= 22/5= 
<gadget id="calculator">22/5</gadget>
<output>22/5 = around 4.4</output>
4.4 kmph   Speed of the boat in still water= 5.5+4.4/2=4.95 kmph   Answer : Option 4.95 kmph
<result>D</result>
A boat running downstream covers a distance of 22 km in 4 hours while for covering the same distance upstream, it takes 5 hours. What is the speed of the boat in still water?