Question

the perimeter of a rectangular cardboard is 96 cm; if its breadth is 18 cm, find the length and the area of cupboard​

Answer 1

Answer:

length is 30cm,Area=540

Step-by-step explanation:

p=2(l+b)

96=2(l+18)

96=2l+36

96-36=2l

60=2l

l=60/2

l=30 cm

Area=l×b

30×18

Area=540

Answer 2

Consider ABCD as a rectangle

Take length = l cm

Breadth = 18 cm

Perimeter = 96 cm

We know that

2 × (l + b) = 96 cm

Substituting the values

2 × (l + 18) = 96 cm

By further calculation

(l + 18) = 96/2

l + 18 = 48

So we get

l = 48 – 18 = 30 cm

Here

Area of rectangular cardboard = l × b

Substituting the values

= 30 × 18

= 540 cm2

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