Cube edges

The sum of the lengths of the cube edges is 42 cm. Calculate the surface of the cube.

Result

S =  73.5 cm2

Solution:

s=42 cm n=3⋅ 4=12 a=s/n=42/12=72=3.5 cm  S=6⋅ a2=6⋅ 3.52=1472=73.5 cm2s=42 \ \text{cm} \ \\ n=3 \cdot \ 4=12 \ \\ a=s/n=42/12=\dfrac{ 7 }{ 2 }=3.5 \ \text{cm} \ \\ \ \\ S=6 \cdot \ a^2=6 \cdot \ 3.5^2=\dfrac{ 147 }{ 2 }=73.5 \ \text{cm}^2

Try another example


Our examples were largely sent or created by pupils and students themselves. Therefore, we would be pleased if you could send us any errors you found, spelling mistakes, or rephasing the example. Thank you!





Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...):

Showing 0 comments:
1st comment
Be the first to comment!
avatar




Following knowledge from mathematics are needed to solve this word math problem:

Next similar math problems:

  1. Sum of the edges
    cube_shield The sum of the lengths of all edges of the cube is 72 cm. How many cm2 of colored paper are we going to use for sticking?
  2. Cube 5
    cube_4 The surface of the cube is 15.36 dm2. How will change the surface area of this cube if the length of the edges is reduced by 2 cm?
  3. Cube edge
    cubes_9 Determine the edges of the cube when the surface is equal to 37.5 cm square.
  4. Cube
    cube_diagonals_3 The sum of all cube edges is 30cm. Find the surface area of the cube.
  5. The cube - simple
    kvader_1 Calculate the surface of the cube measuring 15 centimeters.
  6. Cube 2
    krychle_1 How many times will increase if the surface area of the cube if we triple length of its edge?
  7. Cube
    krychle How many times increases the surface area of a cube with edge 23.4 cm if the length of the edge doubled?
  8. Cube surface area
    cube_5 Wall of cube has content area 99 cm square. What is the surface of the cube?
  9. Surface area of a cube
    cube_shield What is the surface area of a cube that has an edge of 3.5?
  10. Hotel
    hotel The hotel has a p floors each floor has i rooms from which the third are single and the others are double. Represents the number of beds in hotel.
  11. Expression
    expr_2 Solve for a specified variable: P=a+4b+3c, for a
  12. Simplify
    numbers3_1 Simplify the following problem and express as a decimal: 5.68-[5-(2.69+5.65-3.89) /0.5]
  13. Two machines
    machine_2 Performances of two machines are in a ratio of 7:12. A machine with less power produced 406 pieces of products per shift. a) How many pieces produced per shift second machine? b) How many pieces produced two machines together for five shifts?
  14. Simple equation
    eq_1 Solve the following simple equation: 2. (4x + 3) = 2-5. (1-x)
  15. Dropped sheets
    books_26 Three consecutive sheets dropped from the book. The sum of the numbers on the pages of the dropped sheets is 273. What number has the last page of the dropped sheets?
  16. Withdrawal
    penize_13 If I withdrew 2/5 of my total savings and spent 7/10 of that amount. What fraction do I have in left in my savings?
  17. Round it
    rounding 0.728 round to units, tenths, hundredths.