Question

find the perimeter of rectangular hall 30 cm long if length of the hall is w double its breadth​

Answer 1

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Answer 2

Answer:

perimeter = 90cm

Step-by-step explanation:

given that l = 30cm

also given that l=2b

b=l/2

b=30/2=15

perimeter = 2(l+b)

=2(45)

perimeter= 90cm