beam weight 8.7 9

Question

The weight that can be safely supported by a? 2- by? 6-inch support beam varies inversely with its length. A builder finds that a support beam that is
6
feet long will support
1000
pounds. Find the weight that can be safely supported by a beam that is
20
feet long.






The weight that can be safely supported by the beam is
____ lb.

Answer 1

The weight that can be safely supported by a? 2- by? 6-inch support beam varies inversely with its length

means W = k/L, using obvious letters for weight and length.

 

The problem tells you one instance of specific values for W and L; use them to solve for k.

 

Then...what would you do next?  (Read the problem carefully, again).