A man can row with a speed of 15 kmph in still water. If the stream flows at 3 kmph, then the speed in downstream is?  Choices:  A) 33  B) 77  C) 20  D) 18  E) 71
M = 15   S = 3   18S = 15 + 3= 
<gadget id="calculator">15 + 3</gadget>
<output>18</output>
18   Answer: 18
<result>D</result>
A man can row with a speed of 15 kmph in still water. If the stream flows at 3 kmph, then the speed in downstream is?