SOLUTION: Solve Problems Using Linear Systems
7. Tyler rows 10 km downstream in 2 h. On the return trip, it takes hom 4 h to travel 8 km. Determine his average rowing speed and the speed of
Algebra.Com
Question 185485: Solve Problems Using Linear Systems
7. Tyler rows 10 km downstream in 2 h. On the return trip, it takes hom 4 h to travel 8 km. Determine his average rowing speed and the speed of the current.
(answrs are: average rowing speed 3.5 km/h, speed of current 1.5 km/h, but i dont know how to solve it?)
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Tyler rows 10 km downstream in 2 h. On the return trip, it takes hom 4 h to travel 8 km. Determine his average rowing speed and the speed of the current.
------------------------------------------
Downstream DATA:
distance = 10 km ; time = 2h ; rate = 5 km/h
---------------------------------
Upstream DATA:
distance = 8 km ; time = 4 hr ; rate = 2 km/h
--------------------------------
Equations:
b + c = 5
b - c = 2
------------
Add to solve for "b":
2b = 7
b = 3.5 km/h (speed of the boat in still water)
-------------------
substitute into b+c = 5 to solve for "c":
3.5 + c = 5
c = 1.5 km/h speed of the current)
============================================
cheers,
Stan H.
RELATED QUESTIONS
Hello!!
So i tried this equation many times but it did not work out. The Question was:... (answered by stanbon)
A girl rows 11 km downstream in 2 h. Her return trip takes 3 h. How fast can she row in... (answered by josmiceli)
1. Bob left Boston at 9:00am and drove to New Hampshire at 60 km/h. Mike left Boston at (answered by Paul)
Solving Problems Using Linear Systems
8. With a tailwind, a plane flew the 3000 km from... (answered by ankor@dixie-net.com)
A motorboat takes 5 hours to travel 100 km going upstream. The return trip takes 2 hours... (answered by ankor@dixie-net.com)
The speed of a stream is 3 km/h. A boat travels 4 km upstream in the
same time it takes... (answered by lwsshak3)
Nina rows her boat two hours to travel 16 miles downstream and 8 hours on the return... (answered by TimothyLamb)
The distance from cambridge to ottawa is 480 jm. Gerry is able to drive at 100 km/h on... (answered by Earlsdon,stanbon)
A motorboat can travel upstream on a river at 18 km/h and downstream at 30 km/h. How far... (answered by josmiceli)