Question

if the perimeter of a rectangle is 120cm and its width is 20cm what is its length

Answer 1

Answer:

l=40cm

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Answer 2

Answer:

The length is 40 cm.

Step-by-step explanation:

Let the length be x.

2(20 + x) = 120

or, 40 + 2x = 120

or, 2x = 120 - 40

or, 2x = 80

or, x = 40