Question

If the perimeter and length of a rectangular hall are 84 m and 30 m respectively then find the area of the hall .
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Answer 1

$<marquee> Perimeter = 84$

Length = 30m

we know the area of a rectangle is

Length × Breadth

So,

=> 30m × B = 84m

=> B = 84/30

= 14/5

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Answer 2

Answer:

Hope my answer helps you mate :-)

Step-by-step explanation:

Perimeter of hall=84m

Length of Hall=30m

Let breadth be x

• Perimeter = 2×(l+b)
• 84= 2×(30 + x)
• 42-30=x
• x=12m

Area = L×B

• 30×12
• 360m²

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