Question

The area a picture is 441 sq.cm.what is the length of it's side?

Answer 1

IF IT IS A SQUARE SHAPE PICTURE THEN THE ANSWER IS 21

Answer 2

If the Picture is in square shape, then your answer is :

Area of a Square = $Side^{2}$ = 441 Sq.cm

Side = $\sqrt{441}$ = 21 cm