Question

A rectangular field is25 m by 16 m . Find the side of the square whose area equals the area of the given rectangle

Answer 1

$ar(rectangle) = l \times b \\ = 25 \times 16 \\ = 400 {m}^{2} \\ \\ ar(square) = {side}^{2} \\ 400 = {side}^{2} \\ side = \sqrt{400} = 20m$