A man rows his boat 80 km downstream and 45 km upstream, taking 2 1/2 hours each time. Find the speed of the stream? Answers:
A) 1 kmph	B) 6 kmph	C) 5 kmph	D) 8 kmph	E) 7 kmph
Speed downstream = d/t = 80/(2 1/2) = 32 kmph   Speed upstream = d/t = 45/(2 1/2) = 18 kmph   The speed of the stream = (32 - 18)/2= 
<gadget id="calculator">(32 - 18)/2</gadget>
<output>7</output>
7 kmph   Answer:7 kmph
<result>E</result>
A man rows his boat 80 km downstream and 45 km upstream, taking 2 1/2 hours each time. Find the speed of the stream?