😉😉 ANSWER IS HERE:
AREA OF A RECTANGLE = (LENGTH x BREADTH) = 36 x 25 = 900
ACCORDING TO THE QUESTION = ( PAINT NEEDED TO PAINT A RECTANGULAR WALL = PAINT NEEDED TO PAINT A SQUARE WALL )
= AREA OF A RECTANGULAR WALL = AREA OF A SQUARE WALL
= AREA OF SQUARE = 900 m2 = (area of square formula= (side)2)
= SIDE x SIDE = 900
=SIDE = √900
30
∴ THE LENGTH OF SIDES OF SQUARE WALL = 30.