Rational Work Problems

For Benny, it takes six hours to clean the attic. However, Mary takes twelve hours to clean the attic. If working together, how long would they take?

• 6

• 4

• 11

• 3

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Joan can clean the store in five hours. If Dan helps, it takes them four hours. Without help, how long would it take Dan to complete this job ?

• 10

• 25

• 20

• 15

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CCSS.HSA.CED.A.1

Sara takes eleven hours to vacuum the house. It takes Dan twelve hours to complete this job. How long would it take if they worked together?

• 2.54

• 6.43

• 5.74

• 4.32

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CCSS.HSA.CED.A.1

Keith and Melanie were able to reupholster furniture in three hours together. It takes Melanie five hours to do this job alone. Without help, how long would it take Keith to do this job ?

• 5.5

• 6.5

• 7.5

• 8.5

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CCSS.HSA.CED.A.1

Tim and Tom were able to reupholster furniture in four hours together. It takes Tom eleven hours to do this job alone. Without help, how long would it take Tim to do this job ?

• 6.12

• 7.32

• 6.29

• 9.34

Tags

CCSS.HSA.CED.A.1