Question

What is the greatest perimeter of a rectangle with an area of 39 sq. ft.?

Answer 1

Rectangle A:
-- Length = 20-ft, Width = 10-ft.
-- Area = 200 square ft
-- Perimeter = 60-ft

Rectangle B:
-- Length = 16-ft, Width = 12.5-ft
-- Area = 200 square ft
-- Perimeter = 57-ft

Rectangle C:
-- Length = 40-ft, Width = 5-ft
-- Area = 200 square ft
-- Perimeter = 90-ft

Rectangle D:
-- Length = 50-ft, Width = 4-ft
-- Area = 200 square ft
-- Perimeter = 108-ft

Rectangle E:
-- Length = 100-ft, Width = 2-ft
-- Area = 200 square ft
-- Perimeter = 204-ft

Rectangle F:
-- Length = 800-ft, Width = 3 inches
-- Area = 200 square ft
-- Perimeter = 1600-ft 6-in

Answer 2

To find the answer you do 39×4. You multiply by 4 because there are 4 sides.

This will be the biggest number.