Water is flowing at the rate of 2.52 km/h through a cylindrical pipe into a cylindrical tank, the radius of the base is 40cm. If the increase in the level of water in the tank, in half an hour is 3.15m, find the internal diameter of the pipe.

Explanation

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

### Step 1: Convert the given values into consistent units
- The radius of the base of the tank is given as 40 cm. We convert this to meters:
\[ r = 40 \text{ cm} = 0.4 \text{ m} \]
- The increase in the level of water in the tank is given as 3.15 m.
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