it takes johnny and his dad 5 hours to wash the family car. kate, johnny's sister, can wash the car 3 times as fast as johnny. when johnny is not available, it takes kate and her dad 4 hours to wash the family car. how long would it take kate and johnny, all by themselves, to wash the family car?

it takes johnny and his dad 5 hours to wash the family car. kate, johnny's sister, can wash the car 3 times as fast as johnny. when johnny is not available, it takes kate and her dad 4 hours to wash the family car. how long would it take kate and johnny, all by themselves, to wash the family car?

Elementary Algebra

17th Edition

ISBN:9780998625713

Author:Lynn Marecek, MaryAnne Anthony-Smith

Publisher:Lynn Marecek, MaryAnne Anthony-Smith

Chapter8: Rational Expressions And Equations

Section8.8: Solve Uniform Motion And Work Applications

Problem 8.170TI: Cara and Cindy, working together, can rake the yard in 4 hours. Working alone, it takes Cindy 6...

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