l=20.7w=7.4

The perimeter of a rectangle is equal to the sum of all sides of the rectangle.

length+length+width+width=2⋅(length)+2⋅(width)

Substitute the values of the length l=20.7 and width w=7.4 into the formula for the perimeter of a rectangle.

2⋅20.7+2⋅7.4

Multiply 2 by 20.7.

41.4+2⋅7.4

Multiply 2 by 7.4.

41.4+14.8

41.4+14.8

Add 41.4 and 14.8.

56.2

Find the Perimeter rectangle (20.7)(7.4)