The area of a rectangle is 360 cm2 which is equal to 90% of the area of a square. Whatis each side of the square?
area of rectangle=360 sq.cm
side of square=x
area of square=x sq.
given =90/100*x sq.=360
x sq.=360*100/90
x sq.=400
x=20 cm
so, side=20 cm