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338 WorkRate1 |
Name : _________________ |
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15 people can do a job in 9 days. How many days would it take if there were only 3 people? |
21 people can do a job in 9 days. How many days would it take if there were only 7 people? |
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| 338 45 42 28 35 24 ( 174 ) 27 54 12 30 42 ( 165 ) [[ 339 ]] | ||
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