The sum of all cube edges is 30cm. Find the surface area of the cube.


S =  37.5 cm2


s=30 cm a=s/12=30/12=52=2.5 cm  S=6 a2=6 2.52=752=37.5 cm2s=30 \ \text{cm} \ \\ a=s/ 12=30/ 12=\dfrac{ 5 }{ 2 }=2.5 \ \text{cm} \ \\ \ \\ S=6 \cdot \ a^2=6 \cdot \ 2.5^2=\dfrac{ 75 }{ 2 }=37.5 \ \text{cm}^2

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 1 comment:
Dr Math
>>> Is the sum of all edges 30 or 80?

typo fixed, thank you!


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

Next similar math problems:

  1. Cube edges
    cube_shield_3 The sum of the lengths of the cube edges is 42 cm. Calculate the surface of the cube.
  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 walls
    cubes2_9 Find the volume and the surface area of the cube if the area of one of its walls is 40 cm2.
  4. Cube wall
    kocka Surface of first cube wall his 225 mm2. Second cube area is 60% of the surface of the first cube. Determine the length of the edge of the second cube (x).
  5. Given
    1998-4b Given 2x =0.125 find the value of x
  6. Greenhouse
    foliovnik Garden plastic greenhouse is shaped half cylinder with a diameter of 6 m and base length 20 m. At least how many m2 of plastic is need to its cover?
  7. Kitchen
    valcek_na_cesto Kitchen roller has a diameter 70 mm and width of 359 mm. How many square millimeters roll on one turn?
  8. Simplify 2
    expr Simplify expression: 5ab-7+3ba-9
  9. Greg and Bill
    Clock0400_12 Greg is 18 years old. He is 6 less than 4 times Bill's age. How old is Bill?
  10. Simple equations
    enc2 Solve system of equations: 5x+3y=5 5x+7y=25
  11. Equation
    rovnice_3 Solve the equation: 1/2-2/8 = 1/10; Write the result as a decimal number.
  12. Inequation
    inequalities Solve the inequation: 5k - (7k - 1)≤ 2/5 . (5-k)-2
  13. Percents - easy
    percents_5 How many percent is 432 out of 434?
  14. Sales off
    up_to_30 Goods is worth € 70 and the price of goods fell two weeks in a row by 10%. How many % decreased overall?
  15. Conference
    conference 148 is the total number of employees. The conference was attended by 22 employees. How much is it in percent?
  16. Gloves
    rukavice I have a box with two hundred pieces of gloves in total, split into ten parcels of twenty pieces, and I sell three parcels. What percent of the total amount I sold?
  17. New refrigerator
    lednice New refrigerator sells for 1024 USD, Monday will be 25% discount. How much USD will save, and what will be the price?