Question

chapter = understanding quadrilaterals. The side of a rectangle are in the ratio 2:5.If perimeter of rectangle is 210cm then find the area of rectangle​

Answer 1

answer=2250cm²

Step-by-step explanation:

L=2x

b=5x

perimeter of rectangle=210

2(L+B)=210

2(2x+5x)=210

2x+5x=210/2

7x=105

x=105/7

x=15

Length=2x=2×15=30

Breadth=5x=5×15=75

area=L×B

30×75=2,250 cm²

Answer 2

Answer:

Area of the rectangle is 1500 sq.cm

Step-by-step explanation:

So, let's take the sides as 2x cm and 5x cm.

= 2(Length + Breadth) = Perimeter

= 2(2x + 5x) = 210 cm

= 2 * 7x = 210 cm

= 14x = 210 cm

= x = 210/14

      = 15 cm

So, the sides become,

= (2*15) cm ; (5*15) cm.

= 30 cm ; 75 cm.

Now, area is

= Length * Breadth = Area

= 30 * 50 = Area

= 1500 sq.cm = Area