20 beavers, working together in a constant pace, can build a dam in 3 hours. How many hours Z will it take 12 beavers that work at the same pace, to build the same dam?	Choose the correct choice from the following answers
A) 2.  B) Z=4.  C) Z=5.  D) 6.  E) 8.
C. 5 hrs   If there were 10 beavers it qould have taken double Z= 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 Z will it take 12 beavers that work at the same pace, to build the same dam?