Question

Work out the area of a rectangle with base, b = 38mm and perimeter, P = 100mm.

Answer 1

Step-by-step explanation:  b= 38mm

P = 100mm

P= 2(l+b)

=> 100=2(l+38)

=> 100/2=l+38

=> 50 = l+38

=> 50-38=l

=> l = 12mm

Area = l×b

= 12 × 38

= 456 mm²

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Answer 2

Answer:-

• $area \: of \: \: rectangle = 456 {mm}^{2}$

Given:-

• Base= 38mm
• Perimeter=100mm

To find:-

• Area of the rectangle= ....?

Solution:-

Perimeter of rectangle= 2(l+b)

100mm= 2(l+38mm)

50mm=(l+38mm)

length=(50-38)mm=12mm

As we know that,

$area \: of \: rectangle = length \times breadth$

Now,

$area = 12mm \times 38mm \\ area = 456 {mm}^{2}$

Hope its help uh✌❤