Question

the perimeter of a rectangle is 40 cm and its breadth is 7 cm find its length​

Answer 1

Step-by-step explanation:

perimeter of a rectangle= 2(l+b)

Therefore,

40= 2(l+7)

40/2= l+7

l+7= 20

l= 13

Therefore the length is 13 cm

Answer 2

Answer:

let length be x

perimeter of rectangle =2(l+b)

40=2(x+7)

40=2x+14

40-14=2x

36=2x

x=36/2

x=18

length =18cm