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23 December, 16:48

The expression 2l + 2w is used to find the perimeter of a rectangle with length l and width w.

What is the perimeter of a rectangle with length 18 cm and width 3 cm?

21 cm

24 cm

42 cm

54 cm

+2
Answers (2)
  1. 23 December, 19:35
    0
    The perimeter is 42 cm.

    Using the expression 2l + 2w, it would be 2 (18) + 2 (3)

    2 (18) = 36

    2 (3) = 6

    36 + 6 = 42
  2. 23 December, 20:11
    0
    2 (18cm) + 2 (3cm) = perimeter

    36cm + 6cm = P

    The answer is 42cm
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