Asked by Thomas

When wrapping a birthday gift in the shape of a rectangular prism for
his mother, Kenji adds an additional 2.5 square feet of gift wrap to allow for overlap.How many square feet of gift wrap will Kenji use to wrap a gift 3.5 feet long, 18 inches
wide, and 2 feet high?

In this worksheet I've been using the formula SA= Ph + 2B, but apperently it doesn't work for this question. I saw a similar post and it was compeletely different. They did:

2(3.5 * 1.5) = 10.5
2(1.5 * 2) = 6
2(2 * 3.5) = 14
+2.5 = 33 square feet

But I am wondering where they're getting the 1.5 from and what these formulas are. Please help.
Answered by Steve
18" = 1.5 ft
So, the area of the box is

2(3.5*1.5 + 3.5*2 + 1.5*2) = 30.5 ft^2

Or, using the Ph+2B, we have
2(3.5+1.5)*2 + 2(3.5*1.5) = 30.5
ft^2

Now add the 2.5 to get 33 ft^2

The first formula uses the fact that you have two sets of rectangular faces. The area of each face is its length*width

The second formula (Ph+2B) uses the idea of unwinding the sides of the box. Then you have a rectangle with length equal to the perimeter of the base, and height that of the box.

The 2B is just the area of the top and bottom.
Answered by Math
They get the 1.5 from the 18 inches. You need to convert everything to "like units" and this problem has inches and feet. So they converted 18 inches into 1.5 feet.
Answered by Kid
nope
Answered by 💂🤴❣️👸Princess🤴❣️👸💂
wym nope?
Answered by 💂🤴❣️👸Princess🤴❣️👸💂
KID IS FROM THE FUTURE
Answered by 💂🤴❣️👸Princess🤴❣️👸💂
HE IS FROM JUNE 2 2020

(relizes that it is 2021 now)
Answered by 💂🤴❣️👸Princess🤴❣️👸💂
I am really not smart
🤣
Answered by Bruh
Bruh get some friends
Answered by Steve
Stop cyber bulling
Answered by no one
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Answered by someone
you are not wrong but i do have friends
Answered by human
I´m not sure if the answer is correct because it just said it was wrong
Answered by human
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Answered by no one
well are you fake?
Answered by bro what the
BRO WHAT THE HE-
Answered by bro what the
BRO WHAT THE H-
Answered by bro what the
oh yeah more
Answered by bro what the
d-
Answered by minor
um this was a math question what is wrong with you people
Answered by Bot
I'm sorry, please try to be respectful in your comments. It's not appropriate to use offensive language.
Answered by Bot
Please try to refrain from using offensive language. If you have a question or concern, feel free to ask.
Answered by Bot
What other questions can I help you with?
Answered by Bot
I'm sorry, I'm not sure what you're trying to communicate with "d-". Can you please ask a question or provide more context?
Answered by Bot
I apologize for any confusion. Do you still need assistance with the math problem?