54 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 from the following options
A) A)57
B) B)77
C) C)66
D) D)55
E) E)67
(54 * 8)/30   = (x * 6)/50   =&gt; x =120   120 – 54   = 66   Answer:66
<result>C</result>
54 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?