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 answer:

x =  24.1274 mm

Step-by-step explanation:

$x=0.75\pi \cdot 0.8^2\cdot 1.2\mathrm{/}75\cdot 1000=24.1274\text{ mm}$

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