Answer
$P=18\sqrt 5\ ft$
$A=100\ ft^2$
Work Step by Step
Step 1. Using the figure given in the Exercise and the formulas, we have for the perimeter $P=2\sqrt {125}+2\times2\sqrt {20}=10\sqrt 5+8\sqrt 5=18\sqrt 5\ ft$
Step 2. The area can be found as $A=(\sqrt {125})(2\sqrt {20})=2\sqrt {2500}=2\times50=100\ ft^2$
