The speed of a boat in still water is 60kmph and the speed of the current is 20kmph. Find the speed downstream and upstream?	Choose the correct choice from the following:  A) 40, 68 kmph  B) 40, 30 kmph  C) 90, 60 kmph  D) 40, 60 kmph  E) 20, 60 kmph
Speed downstream = 60 + 20= 
<gadget id="calculator">60 + 20</gadget>
<output>80</output>
80 kmph   Speed upstream= 60 - 20= 
<gadget id="calculator">60 - 20</gadget>
<output>40</output>
40 kmph   Answer: 40, 60 kmph
<result>D</result>
The speed of a boat in still water is 60kmph and the speed of the current is 20kmph. Find the speed downstream and upstream?