SOLUTION:
a boat traveled 210 miles downstream and back. the trip downstream took 10 hours. the trip back took 70 hours. what is the speed of the boat in still water? what is the speed of
Algebra.Com
Question 701190:
a boat traveled 210 miles downstream and back. the trip downstream took 10 hours. the trip back took 70 hours. what is the speed of the boat in still water? what is the speed of the current?
Answer by checkley79(3341) (Show Source): You can put this solution on YOUR website!
D=RT
210=R*10 DOWNSTREAM.
R=210/10
R=21 MPH.
210=R*70 UPSTREAM
R=210/70
R=3 MPH. UPSTREAM.
(21+3)/2=24/2=12 MPH. FOR THE BOAT IN STILL WATER.
21-12=9 MPH. FOR THE CURRENT.
PROOF:
3+9=12
21-9=12
RELATED QUESTIONS
A boat traveled 210 miles downstream and back. the trip downstream took 10 hours and the... (answered by stanbon)
A boat traveled 210 miles downstream and back. The trip downstream took 10 hours. The... (answered by josmiceli)
A boat traveled 210 miles downstream and back. The trip downstream took 10 hours. The... (answered by mananth)
A boat traveled 210 miles downstream and back. The trip downstream took 10 hours. The... (answered by Alan3354)
A boat traveled 210 miles downstream and back. The trip downstream took 10 hours. The... (answered by mananth)
a boat traveled 210 miles downstream and back. the trip downstream took 10 hours. The... (answered by mananth)
A boat traveled 210 miles downstream and back. The trip downstream took 10 hours. The... (answered by Alan3354)
A boat traveled 210 miles downstream and back. The trip downstream took 10 hours. The... (answered by josgarithmetic,ikleyn)
A boat traveled 210 miles downstream and back. The trip downstream too 10 hours. The... (answered by checkley77)