Question

The area of a rectangle is 360 cm2 , which s equal to 90% of the area of a square . What is each side of the square ?

Answer 1

Area of square = 360*90/100 = 324 cm square
324 = side square
side = √324
= 18 cm

Answer 2

Answer:

20 cm.

Step-by-step explanation:

Let the side of the square be s

So, area of square = $Side^{2}$

                               = $s^{2}$

Area of rectangle = 360 square cm.

Now we are given that The area of a rectangle is 360 square cm , which is equal to 90% of the area of a square .

⇒$360 = 90 \% \times s^2$

⇒$360 = \frac{90}{100} \times s^2$

⇒$\frac{36000}{90} = s^2$

⇒$400= s^2$

⇒$\sqrt{400}= s$

⇒$20= s$

Thus the side of square is 20 cm.