A cylinder of radius 12cm contains water to a depth of 20cm. A spherical iron ball is dropped into the cylinder and thus the level of water is raised by 6.75 cm. Find the radius of the ball. `(use\ pi=(22)/7)`

Explanation

To solve the problem step by step, we will follow these calculations:

### Step 1: Calculate the volume of water displaced
The volume of water displaced by the spherical iron ball is equal to the volume of the water raised in the cylinder. The formula for the volume of water raised in a cylinder is given by:

\[ \text{Volume} = \pi r^2 h \]
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