Answer
$6000 ft^2$
Work Step by Step
To compute the area, you must first convert the measurements to the same unit of measure. Since the answer is in square feet, convert to feet.
$100\ yd=100\ yd\times\frac{3\ ft}{1\ yd}=300\ ft$
Use the formula for the area of a rectangle, and substitute the given values.
$A=bh=(20\ ft)(300\ ft)=6000\ ft^2$
