If 17 labourers can dig a ditch 26 m long in 18 days, working 8 hours a day; how

Question

If 17 labourers can dig a ditch 26 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 ?

Options:

A . 34

B . 51

C . 68

D . 85

Answer: Option B

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