Question

The diameter of a sphere d is directly proportional to the cube root of its mass w. Given that

mass is 27kg when the diameter is 21cm, find the radius when the mass is 512 kg​

Answer 1

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1. josgarithmetic(34700) (Show Source): You can put this solution on YOUR website!
2. d, diameter in cm
3. w, mass in kg
4. k, variation constant
5. Diameter is two multiplied by Radius.
7. d=k%2Aroot%283%2Cw%29
10. ----
11. Given that the mass is 27kg when the diameter is 21cm, find the radius when the mass is 512kg.
12. ----
14. Substitute and solve. You need the first part to find k first, before finding HALF the diameter