Answer:
Perimeter of rectangle = ⇒
feet
Step-by-step explanation:
Given:
Length of a rectangular sand box = 
Width of the box = 
Perimeter of a rectangle = 
where
represents length of rectangle and
represents width of the rectangle.
Substituting values given for length and width.
Perimeter of sand box = 
Simplifying by adding fractions:
⇒
(Adding whole numbers and fractions separately)
⇒
feet
Whole number 8 can be written as 
⇒
feet
To add fractions we take LCD for the denominators 3,4,1.
LCD for 3 and 4 = 12 as its the least common multiple of 3,4,1.
Making denominators =12 by multiplying numerator an denominator with the corresponding numbers
⇒
feet
⇒
feet
Then we simply add numerators.
⇒
feet
⇒
feet
⇒
feet
⇒
feet
Writing fraction as a mixed number by dividing 218 by 12 and writing quotient as whole number and remainder as numerator with divisor as denominator.
⇒
feet
Simplifying fractions to simplest form.
⇒
feet
Perimeter =⇒
feet (Answer)