Question

The length of rectangle is twice it’s breadth and the perimeter is 30cm what is its breadth

Answer 1

Answer:5 cm

Step-by-step explanation:

Let the breadth =x

And length =2x

Perimeter=2(l +b)

30= 2(2x + x)

30=4x+ 2x

30=6x

5=x ans

Answer 2

Let ,l=2b and substitute in perimeter formula 2(l+b)