Answer:
30 inches
Step-by-step explanation:
As, the stability ball of Ana is congruent to the stability ball of Fredrick. This implies that the volume of both the balls will be same.
So, Volume of Ana's ball = Volume of Fredrick's ball = 4500 .
Now, the volume of a sphere is given by , where 'r' is the radius.
Substituting the value of the volume in this formula, we will obtain the radius.
i.e.
i.e.
i.e. r = 15 inches
As, diameter is the double of the radius.
So, diameter = 2×radius = 2×15 = 30 inches.
Hence, the diameter of Fredrick's ball the 30 inches.