Question:
A solid rectangular working surface is to be painted with stain paint. The surface is 5.3 feet in length, 3.2 feet in width and 4.2 feet in height. What Is the surface area that needs to needs painted?
Answer:
5.3 (L) x 3.2 (W) x 4.2 (H) that will equal 71.232
Step-by-step explanation:
A surface area is the total area of the surface of a three-dimensional object. Example: the surface area of a cube is the area of all 6 faces added together. Using that information we have to find the top, the back, the bottom, the right and left end, and the front. The easiest way to do that is by multiplying LxWxH (Length times width times height) by doing this multiplication you can cover all of the top, the back, the bottom, the right and left end, and the front of the 3 dimensional object. now when we do 5.3 (L) x 3.2 (W) x 4.2 (H) that will equal 71.232. The surface area it needs to be painted is 71.232.
Question:
If the stain comes in cans that cover 22 square feet, how many cans of stain are needed?
Answer:
3 cans with stain in it
Step-by-step explanation:
If we look at our first question we can see that the surface area needs to be painted is 71.232. now if wee do 71.232 / 22 (The surface number, divided by, how many square feet the stain pan will cover) It equals 3.237. Dividing these two number helps you see that you need about 3 cans with stain in it. It is just like is we add 3 can of 22 and that the closes yo will get to 71.
Question:
A Cube is to be covered with paper. The cube has 4.3 feet on edge. What is the surface area to be covered?
Answer:
110.94 to be our surface area.
Step-by-step explanation:
First you would do 4.3 x 4.3 (L x W) and that equal 18.49. Since it is a square every side is 18.49 so we would do 18.49 x 6 because there are 6 sides to get 110.94 to be our surface area.
Question:
If each roll of paper covers 30 square feet, how many rolls of paper are needed?
Answer:
110.94 / 30 = 3.698
Step-by-step explanation:
Each roll of paper covers 30, our surface area is 110.94 therefor we do the same as we did on the 2nd answer, 110.94 / 30 = 3.698 (go to second answer for more details.)
I hope it help ,please mark me brainest if I got them right but tell me if I got them wrong! Have a nice day!
