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478 WorkRate1 |
Name : _________________ |
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28 people can do a job in 10 days. How many days would it take if there were only 4 people? |
20 people can do a job in 7 days. How many days would it take if there were only 4 people? |
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| 478 70 15 30 72 28 ( 215 ) 35 63 21 56 20 ( 195 ) [[ 410 ]] | ||
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