45 men working 8 hours per day dig 30 m deep. How many extra men should be put to dig to a depth of 50 m working 6 hours per day?

2 Answers on this Question

1. answer 36

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2. answer is 100
   [(45 men*8hours)/30 meters]=12 (working rate)
   [(x men*5 hours)/50 meters]=12 (working rate is same)
   then x=100

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