January 2005 - Question 2
We're going to look at the common factors that are on the right side and take them across to the left.
V/π = 4/3r3
Now we're going to take another common factor, but as it's a fraction, we need to flip it over.
3V/4π = r3
Now all we need to do is take over the power of 3.
3√(3V/4π) = r