Question

The perimeter of a room is 24cm. If it length is 8cm ,what is it's area

Answer 1

Answer:

32 sq. cm

Step-by-step explanation:

Given that,

Perimeter of a room's floor = 24 cm

Length of floor = 8 cm

Let the breadth be 'b'

As we know that,

Perimeter = 2(l+b)

Substituting the values, we get,

=> 2(8+b) = 24

=> 8 + b = 24/2

=> 8 + b = 12

=> b = 12 - 8

=> b = 4

Therefore, breadth is 4 cm

Now, to find the area of floor.

We know that,

Area, a = Length × Breadth

=> a = 8 × 4

=> a = 32

Hence, required area is 32 sq. cm

Answer 2

Answer:

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Step-by-step explanation:

The length=8 c.m

The perimeter=24 c.m

=> 2(l+b)= 24

=>2(8+b)=24

=>8+b=24/2

=>b=12-8

=>b=4