The diameter of a pipe at two points , where a venturimeter is connected is 8 cm and 5 cm and the difference of levels in it is 4 cm. Calculate the volume of water flowing through the pipe per second.

Explanation

To solve the problem of calculating the volume of water flowing through a pipe per second using a venturimeter, we can follow these steps:

### Step 1: Identify the given data
- Diameter at point 1 (D1) = 8 cm
- Diameter at point 2 (D2) = 5 cm
- Height difference (h) = 4 cm

### Step 2: Calculate the radii of the pipe
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