Calculus I

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A tank in the shape of an inverted right circular cone has height $10$ meters and radius $8$ meters. It is filled with $6$ meters of hot chocolate.
Find the work required to empty the tank by pumping the hot chocolate over the top of the tank. Note: the density of hot chocolate is $\delta = 1470 kg/m^3$

• Calculus I (please clarify) -

What do the $signs mean before and after the numbers? What does$ \ mean in front of "delta"?

Does <$6$ meters> mean 6 cubic meters or a liquid height of 6 meters?

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