Cube into cylinder

If we dip a wooden cube into a barrel with a 40cm radius, the water will rise 10 cm. What is the size of the cube edge?

Correct result:

a =  36.9054 cm

Solution:

r=40 cm h=10 cm  V=π r2 h=3.1416 402 1050265.4825 cm3  V=a3  a=V3=50265.48253=36.9054 cm



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