If a boat goes 7 km upstream in 42 minutes and the speed of the stream is 6 kmph, then the speed of
the boat in still water is Pick one.
A) 12 kmph	B) 13 kmph	C) 14 kmph	D) 15 kmph	E) None of these
Explanation:   Rate upstream = (7/42)*60= 
<gadget id="calculator">(7/42)*60</gadget>
<output>10</output>
10 kmph.   Speed of stream= 6 kmph.   Let speed in still water is x km/hr   Then, speed upstream = (x ï¿½6) km/hr.   x-6 = 10 or x = 16 kmph   Answer: None of these
<result>E</result>
If a boat goes 7 km upstream in 42 minutes and the speed of the stream is 6 kmph, then the speed of
the boat in still water is