9 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) 33 B) 66 C) 88 D) 11 E) 281
(9 * 8)/30 = (x * 6)/50 =&gt; x = 20   20 – 9 = 11   Answer: 11
<result>D</result>
9 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?