Question

Work out the area of a rectangle with base b=38mm and perimater, p=100mm

Answer 1

Answer:

456 mm^2

Step-by-step explanation:

Half of the perimeter is length +breadth.

Here half of the perimeter is 50 mm.

$l = 50 - 38 = 12mm \\ the \: area \: is \: l \times b = 38 \times 12 = 456 {mm}^{2}$

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Answer 2

Step-by-step explanation:

• Perimeter of rectangle =100mm
• Length of rectangle=38mm

According to formula

$perimeter = 2(l + b)$

• Perimeter of rectangle =2(38+b)
• 100=2(38+b)
• 100 =38+b

2

• 50=38+b
• 50-38=b
• 12=b

Breadth of rectangle =12mm

$area \: of \: rectangle = l \times b$

Area of rectangle =38x12

=456mm

Area of rectangle =456mm