Question

area of rectangle 96 cm 2 its length is12cm find its perimeter​

Answer 1

Answer:

40 cm

Step-by-step explanation:

area of rectangle = l×b

96 = 12 × b

96/12 = b

8 = b

perimeter of rectangle = 2(l+b)

= 2( 12+8)

= 2× 20

= 40 cm.

Answer 2

Answer:

Given area of the rectangle = 96cm²

Given length of the rectangle = 12 cm

Breadth = ?

We already know that area of rectangle = lxb. By substituting the values, we can find the value of the breadth

⇒ Area = l x b

⇒ 96cm² = 12 cm x b

⇒ 96cm²/ 12cm = b  (by using transposing method, the length will shift to the L.H.S which will be then divided by 96cm²)

⇒ 8cm = b

∴ Breadth of the rectangle = 8cm

Given length of the rectangle = 12cm

Given breadth of the rectangle (from the above solution) = 8cm

Perimeter of the rectangle = 2(l+b)

⇒ 2 (12cm+8cm)

⇒ 2(20cm)

⇒ 40cm

∴ Perimeter of the rectangle = 40cm

Hope it helps you!!!