A man rows his boat 75 km downstream and 45 km upstream, taking 5 hours each time. Find the speed of the stream?  Options.
A) 6 kmph	B) 5 kmph	C) 2 kmph	D) 3 kmph	E) 1 kmph
Speed downstream = d/t = 75/(5)= 
<gadget id="calculator">75/(5)</gadget>
<output>15</output>
15 kmph   Speed upstream= d/t = 45/(5)= 
<gadget id="calculator">45/(5)</gadget>
<output>9</output>
9 kmph   The speed of the stream= (15 - 9)/2= 
<gadget id="calculator">(15 - 9)/2</gadget>
<output>3</output>
3 kmph   Answer:3 kmph
<result>D</result>
A man rows his boat 75 km downstream and 45 km upstream, taking 5 hours each time. Find the speed of the stream?