A rectangle has a perimeter of 48 cm. If its length is three times its width, what is its area in square centimeters?

✓ Correct Answer: Option C

Let width = w and length = l. Perimeter = 2(l+w) = 48, so l+w = 24. Given l=3w, substitute into the equation: 3w+w = 24 => 4w = 24 => w = 6 cm. Then l = 3*6 = 18 cm. Area = l*w = 18*6 = 108 cm².