Question

The perimeter of rectangle firld is 80ft and its width is 10ft . Find yhe area of this field
Plz answer fast

Answer 1

Answer: Area = 300 ft²

Step-by-step explanation:

Perimeter = 80 ft  

width = 10 ft

Perimeter of rectangle = 2(l+b)

80 = 2(l + 10)

l = 30 ft

Area of rectangle = l*b

Area = 30*10

Area = 300 ft²

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Answer 2

Answer:

300 cm²

Step-by-step explanation:

Perimeter of a rectangle :-

$2(l + b)$

Where,

• l = length
• b = breadth

Now, value of length is unknown, so let its value be x:-

$2(x + 10)$

$= > 2x + 20$

But perimeter is given 80 ft:-

$= > 2x + 20 = 8 0$

$= > 2x = 80 - 20 = 60$

$= > x = \frac{60}{2} = 30$

So,

length is 30 ft.

Now, formula for area of a rectangle :-

$l \times b$

Where,

• l = length
• b = breadth

Applying all the values :-

$l \times b = 30 \times 10 = 300 \: {cm}^{2}$

Area = 300 cm².

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