Question

length of a rectangle is 4cm more than its breadth if its perimeter is 40 cm find its length​

Answer 1

Answer:

Step-by-step explanation:

Let the breath be x

Therefore length = X + 4

B/Q

2X(l+b) =perimeter

=2X(x+x+4) =40cm

2X2x+4=40cm

=2x+4=40÷2

=2x=20-4

=x=16÷2

=x=8

Answer 2

Step-by-step explanation:

let b=x and l=4+x

we know that,

perimeter=40

2(l+b). =40

2(4+x+x). =40

2(4+2x). =40

8+4x. =40

4x. =40-8

4x. =32

x. =6

so,length is 10cm and breadth is 6cm