20 beavers, working together in a constant pace, can build a dam in 3 hours. How many hours X will it take 12 beavers that work at the same pace, to build the same dam?	Pick:
A) 2.  B) 4.  C) X=5.  D) X=6.  E) 8.
C. 5 hrs   If there were 10 beavers it qould have taken double X = 6hrs.. so closest to that option is 5.
<result>C</result>
20 beavers, working together in a constant pace, can build a dam in 3 hours. How many hours X will it take 12 beavers that work at the same pace, to build the same dam?