A cylindrical tube of cross sectional area `20cm^(2)` is filled with water to a height of 10cm. The tube carries a tight fitting piston of negligible mass. What will be the pressure exerted at the bottom of the tube when a mass of 2 kg placed on the piston? Atmospheric pressure can be ignored.

Explanation

To solve the problem step-by-step, we will calculate the pressure exerted at the bottom of the tube when a mass of 2 kg is placed on the piston.

### Step 1: Calculate the weight of the mass placed on the piston.
The weight \( W \) of the mass can be calculated using the formula:
\[ W = m \cdot g \]
where:
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