Question

the perimeter of a rectangle is 30cm if it's breadth is 3cm then it's length is​

Answer 1

Answer:

length is 12 cm

Step-by-step explanation:

let the length be x.

2(x+3cm) = 30cm

2(x+3cm) = 30cm.2(x+3cm) = 30cm2x+6cm = 32(x+3cm) = 30cm2x+6cm = 30cm2x = 30cm - 6cm.2(x+3cm) = 30cm2x+6cm = 30cm2x = 30cm - 6cm2x = 22(x+3cm) = 30cm2x+6cm = 30cm2x = 30cm - 6cm2x = 24cmx = 24/22(x+3cm) = 30cm2x+6cm = 30cm2x = 30cm - 6cm2x = 24cmx = 24/2= 12cm.

Answer 2

Answer:

12 is your answer

Step-by-step explanation:

formula for perimeter =2(l+b)

30=2l+6

2l =24

l=24/2

l=12