The speed of a boat in still water is 70kmph and the speed of the current is 20kmph. Find the speed downstream and upstream?  Choose one.
A) kmph B) kmph C) kmph D) kmph E) kmph
Speed downstream = 70 + 20= 
<gadget id="calculator">70 + 20</gadget>
<output>90</output>
90 kmph   Speed upstream= 70 - 20= 
<gadget id="calculator">70 - 20</gadget>
<output>50</output>
50 kmph   Answer:kmph
<result>D</result>
The speed of a boat in still water is 70kmph and the speed of the current is 20kmph. Find the speed downstream and upstream?