Question

perimeter of rectangle us 80m find its area

Answer 1

Step-by-step explanation:

2(l+b) = 80 m

l+b = 40 m

l = 40-b m

Area = lb = (40-b)b = 40b-b² m²

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Answer 2

Perimeter = 80m

Perimeter =

$2(l + b) = 80 \\ l + b = \frac{80}{2} \\ l + b = 40$

l = 20

b = 20

Area =

$l \times b \\ 20 \times 20 \\ 400 {m}^{2}$

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