Okay so I'm trying to work out how many mm of rain fell in a certain area.

I've got the total volume/capacity that fell (3.51125KL) and the total area that it fell in (8558.25m).

My formula is

Total Rainfall = rainfall mm x area covered

How would I make sure that all the different values corrospond? I know I'd convert the area covered into mm but I don't know about the Total Rainfall...

Also, once I have the rainfall mm do I need to square root it to ensure that I have the kind of number meteorologists use?

I've got the total volume/capacity that fell (3.51125KL) and the total area that it fell in (8558.25m).

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this is incorrect
the area must be in length squared, like m^2

By the way, convert the depth from mm into meters and do it in meters^3.

To calculate the rainfall in millimeters, you need to ensure that all the different values correspond correctly. Here's an explanation of how to do it step by step:

Step 1: Convert the area covered from meters to millimeters. Since 1 meter is equal to 1000 millimeters, you multiply the given area by 1000 to get the area in millimeters. In this case, the area is 8558.25m, so to convert it to millimeters, you would multiply it by 1000: 8558.25m x 1000 = 8558250mm.

Step 2: Calculate the rainfall in millimeters using the formula you mentioned: Total Rainfall = rainfall mm x area covered.

- You're given the total volume that fell, which is 3.51125KL (kiloliters).
- Since 1 kiloliter is equal to 1,000,000 milliliters, you multiply the given volume by 1,000,000 to convert it to milliliters: 3.51125KL x 1,000,000 = 3,511,250mL.
- To convert milliliters to millimeters, you divide by 1 (since 1 mL is equal to 1 mm): 3,511,250mL ÷ 1 = 3,511,250mm.

Step 3: Multiply the rainfall in millimeters by the area covered in millimeters to calculate the total rainfall. Using the values from earlier calculations, you would have:

Total Rainfall = 3,511,250mm x 8,558,250mm = 30,053,014,154,125,000mm² (square millimeters).

Regarding your second question, you do not need to take the square root of the rainfall in millimeters. The rainfall value you obtained represents the amount of rain that fell in millimeters over the given area. This is the type of measurement meteorologists typically use, representing the depth or thickness of the rainfall, and does not require further calculations.