Question

When wrapping a birthday gift for his mother kemji adds additional 2.5 square feet of gift wrap to allow for overlap. how many squares feet of gift wrap will kenji use to wrap a gift 3.5 ft long 18 in wide and 2 ft high?

Answer 1

For this case, the first thing to do is find the surface area of a rectangular prism.
A = 2 * (h) * (l) + 2 * (h) * (w) + 2 * (w) * (l)
Where,
h: height
l: long
w: width
Substituting values:
A = 2 * (2) * (3.5) + 2 * (2) * (18/12) + 2 * (18/12) * (3.5)
A = 30.5 ft ^ 2
Then, the amount of wrapping paper is:
W = A + 2.5
W = 30.5 + 2.5
W = 33 ift ^ 2
Answer:
kenji will use 33 ft ^ 2 of gift wrap to wrap a gift