Question

*Length of a rectangle is 5cm and breadth is 3 cm then find the ratio of its perimeter to it's area.*

1️⃣ 8:15
2️⃣ 16:15
3️⃣ 15:16
4️ 15:8​

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:

2. 16:15

Perimeter is 16

Area is 15

Perimeter of rectangle is 2x ( l+b )

= 2 x 8

= 16.

Area of rectangle is l x b

= 5 x 3

= 15.