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12. It takes Kay 10 hours to pick 40 bushels of apples. Marge can pick the same amount in 15 hours. How long would it take them to pick 40 bushels of apples if they worked together?

12. It takes Kay 10 hours to pick 40 bushels of apples. Marge can pick the same amount in 15 hours. How long would it take them to pick 40 bushels of apples if they worked together?

Algebra and Trigonometry (6th Edition)
Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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12. It takes Kay 10 hours to pick 40 bushels of apples. Marge can pick the same amount in 15 hours. How long would it take them to pick 40 bushels of apples if they worked together? 13. Ben can paint a room in 14 hours. If Ben and Jake work together they can paint the same room in 9 hours. How long would it take Jake to paint the same room by himself? 14. One pipe can fill a pool in 9 hours. A second pipe can fill the same pool in 6 hours. How long will it take both pipes to fill three-quarters of the tank? 15. A dump truck travels 300 miles on a freeway in the same amount of time it travels 175 miles on a country dirt road. If the rate of the dump truck is 25 miles per hour less o the dirt road than on a highway, find its rate on the highway.
Transcribed Image Text:12. It takes Kay 10 hours to pick 40 bushels of apples. Marge can pick the same amount in 15 hours. How long would it take them to pick 40 bushels of apples if they worked together? 13. Ben can paint a room in 14 hours. If Ben and Jake work together they can paint the same room in 9 hours. How long would it take Jake to paint the same room by himself? 14. One pipe can fill a pool in 9 hours. A second pipe can fill the same pool in 6 hours. How long will it take both pipes to fill three-quarters of the tank? 15. A dump truck travels 300 miles on a freeway in the same amount of time it travels 175 miles on a country dirt road. If the rate of the dump truck is 25 miles per hour less o the dirt road than on a highway, find its rate on the highway.
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