Rain

How many mm of water rained the roof space 75 m2 if the empty barrel with a radius of 8 dm and height 1.2 m filled to 75% its capacity? :-)

Correct result:

x =  24.1274 mm

Solution:

x=0.75π⋅ 0.82⋅ 1.2/75⋅ 1000=24.1274 mm

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