Math, asked by siddhisoham1214, 3 months ago

Pls answer I need it

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Answered by narayani0450

1

Answer:

30

Step-by-step explanation:

formula of rectangle perimeter - 2*(l+b)

2*(3x+x) = 80

(3x+x)= 80÷2

(3x+x)=40

4x=40

x=40÷4

x=10

length is 3x means 3*10=30

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