A new park is being built in the shape of a trapezoid, as show in the diagram below.

The builders will cover the ground with a solid rubber surface to ensure the children playing have a safe and soft place to land when they jump or fall.

How many square yards of rubber will be needed for this park?

Here is an example of how to solve for area of a trapezoid.

Please type only the number of square yards in the answer box. Your answer may include a decimal. Do not round. 

Formula: A= 12  (b1 +b2)(h).

The area of a trapezoid can be calculated using the formula: A = 1/2 * (b1 + b2) * h, where b1 and b2 are the lengths of the two parallel sides and h is the height.

In this case, let's assume the two parallel sides (b1 and b2) are 80 yards and 60 yards respectively, and the height (h) is 50 yards.

Plugging these values into the formula, we get: A = 1/2 * (80 + 60) * 50 = 1/2 * 140 * 50 = 7000 square yards.

Therefore, 7000 square yards of rubber will be needed for this park.