72 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 answer
A) A)77	B) B)99	C) C)66	D) D)55	E) E)88
(72 * 8)/30   = (x * 6)/50   =&gt; x =160   160 – 72   = 88   Answer:88
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72 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?