508  WorkRate
Together, how long? 1

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If Ann does a job in 5 days, and Bob does it in 9 days, how long do they take together? (Nearest to the 10th...)



If Ann does a job in 6 days, and Bob does it in 10 days, how long do they take together? (Nearest to the 10th...)



If Ann does a job in 3 days, and Bob does it in 4 days, how long do they take together? (Nearest to the 10th...)



If Ann does a job in 7 days, and Bob does it in 7 days, how long do they take together? (Nearest to the 10th...)



If Ann does a job in 4 days, and Bob does it in 8 days, how long do they take together? (Nearest to the 10th...)



If Ann does a job in 8 days, and Bob does it in 10 days, how long do they take together? (Nearest to the 10th...)



If Ann does a job in 8 days, and Bob does it in 5 days, how long do they take together? (Nearest to the 10th...)



If Ann does a job in 4 days, and Bob does it in 5 days, how long do they take together? (Nearest to the 10th...)



If Ann does a job in 4 days, and Bob does it in 7 days, how long do they take together? (Nearest to the 10th...)



If Ann does a job in 2 days, and Bob does it in 10 days, how long do they take together? (Nearest to the 10th...)



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508    3.2 3.8 1.7 3.5 2.7 ( 14.9 )   4.4 3.1 2.2 2.5 1.7 ( 13.9 )   [[ 28.8 ]]