A stack of six bricks is two feet high. Use that information to answer the questions below.  

1. How many bricks are in a stack $20$ feet high?

   Hint (a):

   Use the diagram below for help.

   

   Answer (a):

   ($10$ two-foot stacks)($6$ bricks per two-foot stack) $=60$ bricks

2. How high is a stack of $20$ bricks?

   Hint (b):

   In part (a), you found that $60$ bricks make a stack $20$ feet high. Since $60=(3)(20)$, a stack of $20$ bricks should be one third the height of a stack of $60$ bricks.