SOLUTION: David's boat can travel 11 miles downstream in the same amount of time it can travel 9 miles upstream. If the speed of the boat is 20 miles per hour in still water, find the speed
Algebra.Com
Question 32149: David's boat can travel 11 miles downstream in the same amount of time it can travel 9 miles upstream. If the speed of the boat is 20 miles per hour in still water, find the speed of the current.
Answer by Paul(988) (Show Source): You can put this solution on YOUR website!
Let the speed of the current be x:;
equation:
11(20-x)=9(20+x)
220-11x=180+9x
40=20x
x=2
Hence, the speed of the current is 2mph.
PAul.
RELATED QUESTIONS
April's boat can travel 11 miles downstream in the same amount of time it can travel 9... (answered by richwmiller)
A boat can travel 9 miles upstream in the same amount of time it takes to travel 11 miles (answered by solver91311,nyc_function)
A boat can travel 9 miles upstream in the same amount of time it takes to tarvel 11 miles (answered by stanbon,josmiceli,VickyFM)
A boat can travel 12 miles upstream in the same amount of time it takes to travel 18... (answered by mananth,stanbon)
A boat can travel 14 miles upstream in the same amount of time it takes to travel 21... (answered by Earlsdon)
a boat travel 6 miles upstream in the same amount of time it can travel 10 miles... (answered by mananth)
a boat can travel a 9 minles upstream in the same time amount of time it takes to travel... (answered by venugopalramana)
Fernando’s motorboat can travel 30 mi/hr in still water.
If the boat can travel 9 miles (answered by richwmiller)
A boat can travel 114 miles downstream in the same time that it can travel 24 miles... (answered by josmiceli)