A man can row upstream at 8 kmph and downstream at 13 kmph. The speed of the stream is	Choose the correct option.
A) 2.5 km/hr B) 4.2 km/hr C) 5 km/hr D) 10.5 km/hr E) None
Solution   Speed of stream	= 1 / 2 (13 - 8 )kmph   = 1/2 x 5   =5 /2= 
<gadget id="calculator">5 /2</gadget>
<output>5/2 = around 2.5</output>
2.5   2.5 km/hrnswer 2.5 km/hr
<result>A</result>
A man can row upstream at 8 kmph and downstream at 13 kmph. The speed of the stream is