Carol H. answered • 03/20/18

Tutor

4.9
(285)
Masters' Degree in Mathematics with 35 Years of Teaching Experience

**Let x = the length**

**Let (1/4)x = the width**

**P = 2l + 2w**

**12 = 2x + 2(1/4)x**

**12 = 2x + (1/2)x**

**12 = (5/2)x Multiply both sides by 2/5.**

**4 4/5 km = x**

**(1/4)x = (1/4)(24/5) = 1 1/5 km**

**A = lw**

**A = (24/5)(6/5)**

**A = 5 19/25 km**

^{2}