khlo30
18.01.2020 •
Mathematics
How much paint is needed to paint the walls of a room 16 x 12 x 10 each gallon covers 400 square feet in each quart covers 100 square feet?
Solved
Show answers
More tips
- A Auto and Moto Discovering the Leader: What is the Most Expensive Car in the World?...
- H Health and Medicine Hangover: How to Get Rid of It Quickly?...
- S Style and Beauty How to Choose the Right Fur Coat and Avoid Regrets?...
- C Computers and Internet How to Create a Folder on Your iPhone?...
- G Goods and services How to sew a ribbon: Tips for beginners...
- F Food and Cooking How to Make Mayonnaise at Home? Secrets of Homemade Mayonnaise...
- C Computers and Internet Which Phone is Best for Internet Surfing?...
- F Food and Cooking Everything You Need to Know About Pasta...
- C Computers and Internet How to Choose a Monitor?...
- H Horoscopes, Magic, Divination Where Did Tarot Cards Come From?...
Answers on questions: Mathematics
- M Mathematics Pennsylvania spent $882.87 million on student transportation (for public elementary and secondary education) in 2004-05. A decade later, such expenditure was increased by more...
- M Mathematics The function gx) is a transformation of fx). If g(x) has a y-intercept of -2, which of the following functions could represent g(x)...
- M Mathematics PLEASE HELP I AM MARKING BRAINLEST...
- M Mathematics Question 1 of 10 A scientist gives three trees of the same size and species different amounts of water all summer. He measures how fast the trees grow. What is the manipulated...
- M Mathematics 2 1/5 x 1 3/4 show all work step by step...
- M Mathematics A) 3^-2 b) 4^-3 c) 2^-6...
- M Mathematics 3.6 0.27 ——— 3.87 why ? please explain step by step...
- M Mathematics Suppose f(x) is a twice differentiator function with an anti derivative F such that:...
- M Mathematics Please help someone save my life I need these...
- M Mathematics Please help me find the Average velocity and Velocity in this Calculus problem.Consider a car whose position, s, is given by the table.t (s)00.20.40.60.81s (ft)00.41.43.86.59.6Find...
Ответ:
If you buy in gallon cans, then you need 2 gallons.
If you buy in quarts, then you need 6 quarts.
Work Shown:
I'm assuming this room has 10 ft ceilings. So the length and width of the room is 16 ft by 12 ft. Two walls are 16*10 = 160 square feet each, so we have 2*160 = 320 sq ft so far. Then we have another two walls that are 12*10 = 120 sq ft, giving an additional 2*120 = 240 sq ft. In total, the walls cover 320+240 = 560 sq ft.
The walls are the lateral surface area of the rectangular block that the room forms. You can use this formula
LSA = 2*(L*H + W*H)
to find the lateral surface area (LSA). In this case, L = 16, W = 12, H = 10.
Because 1 gallon of paint covers 400 square feet, we can divide the lateral surface area by 400 to find out how many gallons of paint we need.
560/400 = 1.4
round this up to 2 gallons so we have enough paint. If we round to 1 gallon, then we'll be short of the paint needed (we'll be missing that 0.4 of a gallon).
At the same time, 1 quart of paint covers 100 sq ft, so
560/100 = 5.6
which rounds up to 6. Therefore, we need 6 quarts of paint.
Another way to get this is to multiply 1.4 by 4
1.4*4 = 5.6
because there are 4 quarts in a gallon. This is evident by how 400 is 4 times that of 100.
It might be tempting to round 1.4 up to 2, then multiply by 4 to get 2*4 = 8, which may seem we need 8 quarts instead of 6. This is a bit too much as 6 quarts works also. The value 6 is the smallest whole number of quarts we can buy and still cover all four walls with paint.
Ответ:
9
Step-by-step explanation:
75%= 50% + 25%
50% = 6
25% = 3
75% = 9