Rational Expression Unit Test
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20. The speed of the current in the Mississippi River is 5 miles per hour. A boat travels downstream 26 miles and returns in 10 and 2/3 hours. What is its speed in still water?
21. Jane can type 75 pages in 8 hours. Ted can type the same number of pages in 13 hours. If Jane and Ted work together, how long will it take them to type 75 pages?
22. One hose can fill the local YMCA kids pool in 6 hours. A second, newer hose can fill the pool in 4 hours. If both hoses are used, how long will it take to fill the pool?
