The Perimeter of a Rectangle Is $34 \mathrm{~cm}$ the Length Is

The perimeter of a rectangle is $34 \mathrm{~cm}$ . The length is $11 \mathrm{~cm}$ longer than the width. Find the dimensions.

A) Width: $10 \mathrm{~cm}$ ; length: $21 \mathrm{~cm}$
B) Width: $3 \mathrm{~cm}$ ; length: $11 \mathrm{~cm}$
C) Width: $6 \mathrm{~cm}$ ; length: $17 \mathrm{~cm}$
D) Width: $3 \mathrm{~cm}$ ; length: $14 \mathrm{~cm}$