15 beavers, working together in a constant pace, can build a dam in 4 hours. How many hours will it take 20 beavers that work at the same pace, to build the same dam? Select: A) 2. B) 4. C) 5. D) 6 E) 3.
Total Work = 15*4= 
<gadget id="calculator">15*4</gadget>
<output>60</output>
60 Beaver hours   20 Beaver * x=60 Beaver hours   x=60/20= 
<gadget id="calculator">60/20</gadget>
<output>3</output>
3   ANSW3.R:3.
<result>E</result>
15 beavers, working together in a constant pace, can build a dam in 4 hours. How many hours will it take 20 beavers that work at the same pace, to build the same dam?