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## Homework Statement

Two spheres are cut from a certain uniform rock. One has radius 4.30 cm. The mass of the other is six times greater. Find its radius.

## Homework Equations

v = (4/3)(pi)(r)^3

m = vp

## The Attempt at a Solution

6[(4/3)(pi)(r

_{1})

^{3}] = (4/3)(pi)(r

_{2})

^{3}

8(pi)(r

_{1})3 = (4/3)(pi)(r

_{2})3

6(r

_{1})

^{3}= (r

_{2})

^{3}

6(4.3)

^{(1/3)}= 9.7568

Answer:

9.76 cm

I got this question wrong for some reason... Where is my mistake...?