Find the perimeter of a table cloth that is forty inches square.

8√ (10)

Step-by-step explanation:

The area of a square is given by the formula

A = s²

Since the area is 40, that gives us

40 = s²

Take the square root of each side:

√ (40) = √ (s²)

√ (4*10) = s

2√ (10) = s

Since each side of a square is the same length, this makes the perimeter

2√ (10) + 2√ (10) + 2 (√10) + 2 (√10) = 8√ (10)

Answer: Either 28in or 26in

A table cloth 40 inches squared could be 1 by 40, 2 by 20, 4 by 10, 5 by 8

1 by 40 would have a perimeter of 1 (2) + 40 (2) = 82in

2 by 20 would have a perimeter of 2 (2) + 20 (2) = 44in

4 by 10 would have a perimeter of 4 (2) + 10 (2) = 28in

5 by 8 would have a perimeter of 5 (2) + 8 (2) = 26in

1 by 40, and 2 by 20 are highly unlikely table cloths so it is either 26in or 28in