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?	Choose the correct choice from the following answers
A) 5 kmph
B) 4.95 kmph
C) 4.75 kmph
D) 4.65
E) None of these
Explanation :   Speed downstream = 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= 
<gadget id="calculator">(5.5 + 4.4)/2</gadget>
<output>4.95</output>
4.95 kmph. Answer : Option 4.95 kmph
<result>B</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?