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http://mathwithmcgeorge.weebly.com/uploads/8/2/1/6/82161476/word_problem_hw_1.pdf
An old conveyor belt takes 21 hours to move one days coal output from the mine to a rail line. A new belt can do it in 15 hours. How lorg does it take when both are used at the same time? Pam jogged up a hill at 6 km/h and then joged back down at 10km/h. How many kilometers did she travel in all if her total time was 1 h 20 min?
http://ths.tomballisd.net/ourpages/auto/2015/8/21/54021116/Rational%20Word%20Problems%20WS%20KEY.pdf
Aug 21, 2015 · an approaching storm, both pumps were used. How long did they take to empty the ship? 13 20min.hrs 4. An old conveyor belt takes 21 hours to move one day’s coal output from the mine to a rail line. A new belt can do it in 15 hours. How long does it take when both are used at the same time? 8 45min.hrs 5.
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