Question

A rectangular field is to be fenced on three sides leaving a side of 20 feet uncovered. If the area of the field is 680 sq. feet, how many feet of fencing will be required?

Answer 1

Area=680 sq. feet.
One side=20 feet.
Other side=680÷20=34 feet.

So perimeter of three sides(leaving out one side of 20 feet)=34 feet*2+20feet
=68 feet+20 feet.
=88 feet.