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?	Choose the correct choice
A) 17 B) 97 C) 18 D) 55 E) 72
(45 * 8)/30   = (x * 6)/50   =&gt; x =100   100 – 45   = 55   Answer: 55
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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?