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4. 20 labourers working 6 hours a day can finish a piece of work in 10 days. If each labourerworks 8 hours a day, how many labourers are needed to finish the piece of work in 6 days?​

Answer»

No. of LABORERS                No.  hours .         No. of days                  

20                                       6                            10

x                                           8                            6



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