Question

the length of a rectangle is two times its breadth. if the perimeter is 51cm, find the length and breadth

Answer 1

Answer:

breadth=X

length=2x

perimeter=2(l+b)

=2(X+2x)=2(3x)

=6x ---------equation 1

But given that perimeter is 51cm

Therefore, 6x=51

X=51/6=8.5

8.5 is your answer

Step-by-step explanation:

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Answer 2

Perimeter of a rectangle = 51 cm

Formula= 2*(l+b)

Let length be 2x

Breadth be x

2*(2x+x)=51

First solve the bracket so you get

4x+2x=51

6x=51

x=51/6

as we simplify it we get the answer as 17/2

x=17/2

Length = 17/2*2= 34/4

Breadth=17/2