What is the maximum area of the rectangle with perimeter 620 mm?

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  1. 24,025 mm2
  2. 22,725 mm2
  3. 24,000 mm2
  4. 24,075 mm2

Answer (Detailed Solution Below)

Option 1 : 24,025 mm2
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Detailed Solution

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Given:

Perimeter of rectangle = 620 mm

Formula Used:

Perimeter of rectangle, P = 2(l + w)

Area of rectangle, A = l × w

For a given perimeter, the maximum area of a rectangle is achieved when it is a square (i.e., length = width).

Calculation:

⇒ 620 = 2(l + w)

⇒ l + w = 620 / 2

⇒ l + w = 310

For maximum area, l = w

⇒ l = 310 / 2

⇒ l = 155 mm

⇒ w = 155 mm

Maximum Area = l × w

⇒ Maximum Area = 155 × 155

⇒ Maximum Area = 24025 mm2

The maximum area of the rectangle with perimeter 620 mm is 24025 mm2.

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