Question

Please check my answer!

Answer 1

The front of a metal shed needs to be spray painted. One can of spray paint will cover 20ft^2. If the 8ft x 8ft square door isn't painted, then how many cans of spray paint will you need to buy?

Answer 2

I got 8 cans.

Answer 3

Can you explain how you got eight cans? I got a different answer, however I may have done something wrong so I would like to see your explanation.

Answer 4

I got 8 cans also.

Answer 5

A total of 160 sq ft needs paint.

Answer 6

Lower part is 96 sq ft plus 64 sq ft of the upper.

Answer 7

@radar how did you calculate the roof? If I may ask.

Answer 8

\[96+\frac{ 1 }{ 2 }\times \sqrt{128}\times \sqrt{128}=160\]
\[160\div20=8\]

Answer 9

Note that there is a little square at the top to indicate a right angle so
\[x ^{2}+x ^{2}=16^{2}\]\[2x ^{2}=256\]\[x ^{2}=128\]
Now at this point, we see that one side x is the base, the other x side is altitude
A=1/2 x^2= 1/2 128 =64 sq ft.

Answer 10

I see, thank you. :-)

Answer 11

Do you guys think my answer is correct?

Answer 12

You're welcome, I take i that the bottom half was a piece of cake @Opcode

Answer 13

@MaryLovell15 You have a correct answer. and your approach is reasonable.