Question

the perimeter of rectangle is 42 long and its length is double it's breadth fins the length and breadth of thr rectangle​

Answer 1

Step-by-step explanation:

Perimeter of rectangle =40 cm (given)

condition :- length = 2× breadth +2

⇒l=2b+2

perimeter p=2(l+b)=40

⇒2(2b+2+b)=40

⇒2(3b+2)=40

⇒6b=40−4=36

∴b=6cm

l=2×6+2=12+2=14cm

∴ length =14 cm, breadth =6 cm

Answer 2

Answer:

$length = 2 \times breadth \\ perimeter \: of \: rectangle = 2 \times (l + b) \\ 42 = 2 \times (breadth + b \\ 21 = 3b \\ b = 7 \\ length = 2 \times 7 = 14 \\ therefore \: your \: anwer \: is \: 14 \\ hope \: it \: helps \: you$