* L is the Length and A is the Area
L * L = A
L * L = 1600
L^2 = 1600
√L^2 = √1600
L = 40 feet
Answer: The length of each side is 40 feet.
Btw: this was your question "A square garden has an area of 1600 feet length of each side"
When it should be . . .
"A square garden has an area of 1600 feet squared length of each side"
