1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
11Alexandr11 [23.1K]
3 years ago
14

A cube with 2 inch sides is placed on a cube with 3 inch sides. Then a cube with 1 inch sides is placed on the 2 inch cube. What

is the surface area of the three cube tower?
Mathematics
1 answer:
Taya2010 [7]3 years ago
5 0

Answer:

let's try the "Divide and Conquer" method, that is we break down the problem into pieces and solve each piece until we arrive at the answer.

the formula for the surface area of the cube is:

SA = 6s^2; s is the length of one side of the cube

for the 3-inch cube

SA = 6(3^2)

SA = 6(9)

SA = 54 in^2

note however, that the actual surface area is less the area occupied by the 2-inch cube place on the 3-inch cube, which is

A = s^2; since this is a square

A = 2^2

A = 4 in^2

the actual SA (aSA) therefore of the 3-inch cube is

aSA = 54 - 4 = 50 in^2

for the 2-inch cube

SA = 6s^2

SA = 6(2^2)

SA = 6(4)

SA = 24 in^2

to solve for the actual SA of the 2-inch cube, we subtract the area which is in contact with the 3-inch cube and the 1-inch cube

aSA = 24 - 2^2 - 1^2

aSA = 24 - 4 - 1

aSA = 19 in^2

for the 1-inch cube

SA = 6s^2

SA = 6(1^2)

SA = 6 in^2

the actual surface area is less the area in contact with the 2-inch cube

aSA = 6 - 1^2

aSA = 5 in^2

the surface area of the three cube tower will just be the sum of the aSA of the three cubes

SA = 50 + 19 + 5

SA = 74 in^2   ans

Step-by-step explanation:

You might be interested in
HELP FAST 20 POINTS PLEASE HELP IM BEGGINGGg
Kobotan [32]

Answer:

3.5C = 1n

Step-by-step explanation:

For every $3.5 is 1 mile.

I do not know what other currency this could be, as I only live in the US. Therefor, i'm assuming it's US Dollars. But this does not effect the question, so moving on.

Brainliest for being like only a fortnight late...?

3 0
3 years ago
-k+0.03+1.01k=-2.45-1.81k?
Mrrafil [7]

Answer:

-1.362637

or if you round your answer -1.36

Step-by-step explanation:

solve for k by simplifying both sides of the equation and isolating the variable.

4 0
3 years ago
What is the estimated quotient of 57.8/81
Brut [27]
The answer to this is : 0.75 (.75) 




4 0
3 years ago
What is fractions with model
son4ous [18]
The one represents the number you color in and the 4 represents how many boxes you have

8 0
3 years ago
How can you use addition and subtraction to put together and separate measures of an angle and its parts?
Oksanka [162]
We can use addition and subtraction <span>to put together and separate measures of an angle and its parts by looking for the complementary or the supplementary angles. 

For example, What is the other angle in a complementary angle in which one of the angles is 45 degrees. This is how should be answered. Ccomplementary angles are two angles that forms a total of 90 degrees.
90 = A + B
90 = 45 + B
B = 90 - 45
B = 45

</span>
7 0
3 years ago
Other questions:
  • What's the correct value for the expression 3 x |-4 + 2| - 3 ?
    5·1 answer
  • A rectangle has a width of 2cm and a perimeter of 25cm. Find the length and the area .
    10·1 answer
  • A baseball is hit with a bat etc .....
    12·1 answer
  • PLEASE HELP!!!!!!!
    14·1 answer
  • Jose takes 120 minutes to weed 6 equal rows of vegetable plants in his garden. What is his unit rate
    6·1 answer
  • What is the probability of spinning blue on the image shown?<br> ITS ON THINK THRU MATH NEED HELP
    12·2 answers
  • Pleasee help i put it as 24 points and I will mark brainliest thank you
    10·2 answers
  • Jenny climbed up 35 steps
    13·1 answer
  • When the movie is half over, popcorn sells for half price. Full price popcorn is $3.50, and drinks are $1.35. Determine the cost
    9·1 answer
  • 6 An account pays
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!