Question

Three numbers are in the ratio 3: 4: 5. If the sum of their cubes is 27, then the sum of the numbers is​

Answer 1

Answer:

let the number be 3x+4x+5x

3x^3+4x^3 +5x^3 =27

27x^3+64x^3+125x^3= 27

216x^3=27

x^3= 27/216= 0.125

3x = 0.375

4x = 0.5

5x = 0.625

hope this helps

Answer 2

Answer:

6

Step-by-step explanation:

Let the numbers be 3x, 4x and 5x respectively.

3x^3+4x^3+5x^3= 27

27x^+64x+125x=27

216x^3= 27

x= cbrt of 27/216

=3/4

3x=3/2

4x=2

5x=5/2

3/2+4/2+5/2= 12/2 = 6