Question

I am rectangle my perimeter is 40 centimetre breadth is X and length is three times the breadth perimeter of rectangle is costing​

Answer 1

Step-by-step explanation:

let breadth be x cm

so length be 3x

we know perimeter = 40 cm = 2(l+b)

l+b = 20 cm

3x+x = 20 cm

4x = 20 cm

x= 5cm