A boat running downstream covers a distance of 16 km in 2 hours while for covering the same distance upstream, it takes 4 hours. What is the speed of the boat in still water?
Choose the correct answer: A) 4 km/hr B) 6 km/hr C) 8 km/hr D) Data inadequate E) None
Solution   Rate Downstream	= (16 / 2)= 
<gadget id="calculator">(16 / 2)</gadget>
<output>8</output>
8 kmph   Rate upstream=(16 / 4)= 
<gadget id="calculator">(16 / 4)</gadget>
<output>4</output>
4 kmph.   Speed in still water= 1 / 2 (8 + 4)kmph   = 1/2 x 12   = 6 kmph.   Answer 6 km/hr
<result>B</result>
A boat running downstream covers a distance of 16 km in 2 hours while for covering the same distance upstream, it takes 4 hours. What is the speed of the boat in still water?