Question

Answer for number 5?

Answer 1

Length = 60; Width = 36

The formula for Perimeter is P = 2L + 2W
Where L = length; W = width

192 = 2L + 2W
       = 2(5x) + 2(3x)
       = 10x + 6x
       = 16x
192/16 = 16x/16
         x = 12

Substitute the values:
192 = 2(5x) + 2(3x)
       = 2(5*12) + 2(3*12)
       = 2(60) + 2(36)
192 = 192