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Jobisdone [24]
3 years ago
13

5 men working 6 hours a day can dig a trench 180m long in 4 days. How many days would 8 men working 3 hrs a day take to dig a tr

ench 220m long​
History
1 answer:
nalin [4]3 years ago
7 0

assuming efficiency of each man to dig trench, in one day, for one hour is constant,

e=\frac{180}{4\times6\times5}=\frac{3}{2}

so one man, working for one hour in one day can dig 1.5 m

so 8 men, working 3 hours a day and will take, say $d$ number of days and efficiency will be constant. so,

$\frac32=\frac{220}{8\times3\times d}$

$\implies d=\frac{55}9=6.12$

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