We are given dimensions of the rectangle:
Length= 4.2 units and width = 6.7 units .
Given formula of perimeter = 2L + 2W.
Plugging value of Length= 4.2 and width = 6.7 in above formula, we get
Perimeter = 2(4.2) + 2(6.7)
Multiplying 2 * 4.2 we get 8.4 and multiplying 2* 6.7 we get 13.4.
= 8.4 + 13.4.
= 21.8 units
Therefore, perimeter of the rectangle is 21.8 units .