SOLUTION: Please help me with these word problems... 1. A boat goes 240 miles downstream in the same time it can go 160 miles upstream. The speed of the current is 9 miles per hour. Find

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Question 271332: Please help me with these word problems...
1. A boat goes 240 miles downstream in the same time it can go 160 miles upstream. The speed of the current is 9 miles per hour. Find the speed of the boat in still water.
2. To determine the number of fish in a lake, a park ranger catches 200 fish, tags them, and returns them to the lake. Later, 144 fish are caught, and it is found that 40 of them are tagged. Estimate the number of fish in the lake.
3. Frank can type a report in 4 hours and James takes 6 hours. How long will it take the two of them typing together?
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!

1.



Solve for

2.


Solve for

3.

If A can do a job in time periods and B can do a job in time periods, then A can do of the job in 1 time period and B can do of the job in 1 time period. Then, working together they can do:



of the job in one time period. Therefore they can do the whole job in:



time periods.

Next time, one question per post please.


John