14. It takes Sam 4 hours to rake the front lawn while his brother, Dave, can rake the lawn in 3hours. How long will it take them to rake the lawn working together?

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Answered: 14. It takes Sam 4 hours to rake the…

Algebra: Structure And Method, Book 1

(REV)00th Edition

ISBN:9780395977224

Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Chapter7: Applying Fractions

Section7.8: Work Problems

Problem 3P

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14. It takes Sam 4 hours to rake the front lawn while his brother, Dave, can rake the lawn in 3 hours. How long will it take them to rake the lawn working together?