The speed of a boat in still water is 30kmph and the speed of the current is 20kmph. Find the speed downstream and upstream?
Select:  A) kmph  B) kmph  C) kmph  D) kmph  E) kmph
Speed downstream = 30+ 20= 
<gadget id="calculator">30+ 20</gadget>
<output>50</output>
50 kmph   Speed upstream= 30 - 20= 
<gadget id="calculator">30 - 20</gadget>
<output>10</output>
10 kmph   Answer:kmph
<result>B</result>
The speed of a boat in still water is 30kmph and the speed of the current is 20kmph. Find the speed downstream and upstream?