Question

the sideof the rectangle aRE IN THE RATIO 2:1. THE PERIMETER IS 30 CM. CALCULATE THE MEASURE OF ALL THE SIDES.

Answer 1

Let the side be 2x
let the side be X



perimeter of rectangle = 2 (length + width )
30= 2 (2x + x)
30= 2×3x
30= 6x
30/6 = x
5 = x

side = 2× = 2×5 = 10
side = x =5

Answer 2

Perimeter of rectangle is 30cm.
Ratio of sides of rectangle- 2:1
Let the sides be- (2y)cm, (1y)cm.
Therefore, Length and Breadth is 2y and 1y respectively.

According To Question, Equation formed will be-
Perimeter of rectangle = 2(l+b)
30cm        =     2 [ (2y)cm + (1y)cm ]
30cm/2     =     (3y)cm
15cm /3cm =  y
5cm             =  y

Therefore, length of rectangle = 2y = 2 x 5cm = 10cm.
Breadth of rectangle = 1y = 1 x 5cm = 5cm.