The width of a rectangular field is 20 feet less than its length. the area of the field if 12,000 ft^2. what is the length of the field?

a)80ft
b)100ft
c)120ft
d)140ft

The correct answer is C- 120 feet

C) 120 ft

Step-by-step explanation:

Let the length of the rectangular field be units.

Then the width will be

The area of the field is 12,000  square feet

We substitute these values in the formula for finding the area of a rectangle.

This implies that;

We expand to obtain;

Factor to obtain;

Use the zero product principle to get;

Hence the length is 120 ft