Question

the perimeter of a rectangle is 38.6m the width of the rectangle is 7.2 what is the lengh

Answer 1

formula for perimeter of a rectangle : P = 2L + 2W

P = 38.6
W = 7.2
now we sub
38.6 = 2L + 2(7.2)
38.6 = 2L + 14.4
38.6 - 14.4 = 2L
24.2 = 2L
24.2/2 = L
12.1 = L

check..
P = 2L + 2W
38.6 = 2(12.1) + 2(7.2)
38.6 = 24.2 + 14.4
38.6 = 38.6 (correct)

Length (L) = 12.1