The Perimeter of a Rectangle Is $60 \mathrm{~m}$ If the Width Were Doubled and the Length Were

Multiple Choice

The perimeter of a rectangle is $60 \mathrm{~m}$ . If the width were doubled and the length were increased by 15 $\mathrm{m}$ , the perimeter would be $108 \mathrm{~m}$ . What are the length and width of the rectangle?

A) Length: $15 \mathrm{~m}$ ; width: $15 \mathrm{~m}$
B) Length: $15 \mathrm{~m}$ ; width: $10 \mathrm{~m}$
C) Length: $21 \mathrm{~m}$ ; width: $9 \mathrm{~m}$
D) Length: $9 \mathrm{~m}$ ; width: $21 \mathrm{~m}$