If 17 labourers can dig a ditch 20 m long in 18 days, working 8 hours – McqOptions

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1.	If 17 labourers can dig a ditch 20 m long in 18 days, working 8 hours a day; how many more labourers should be engaged to dig a similar ditch 39 m long in 6 days, each labourer working 9 hours a day ?
A.	34
B.	51
C.	68
D.	85
Answer» B. 51

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