calculus

Water is leaking out of an inverted conical tank at a rate of 10,000 cm^3/min at the same time that water is being pumped into the tank at a constant rate. The tank has height 6 m and the diameter at the top is 4 m. If the water level is rising at a rate of 20 cm/min when the height of the water is 2 m, find the rate at thich water is being pumped into the tank.

Answers

First we use the volume of a cone equation to find the volume of the conical tank when the water level is 2 meters: Volume = (π/3)*h*(r^2+r*R+R^2) Substituting 2 m for h, 6 m for R, and (2/3)x4 m for r, we get Volume = (π/3)*2*((2/3)x4^2+2/3x4x6+6^2) Volume = (π/3)*2*(16+24+36) Volume = (π/3)*2*76 ≈ 502.65 m^3 We can now use a conversion rate to convert cm^3 to m^3 by multiplying by (1/1,000,000), so the rate at which water is leaking out is 10,000 cm^3/min x (1/1,000,000) = 0.01 m^3/min. We know that the rate at which water is going in must match the rate at which is it going out, meaning we need to calculate the rate at which water is being pumped into the tank as 0.01 m^3/min. This is equal to the rate of 10,000 cm^3/min. The rate at which water is being

Answered by Mike

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