A conical tent is to accommodate 11 person.Each person must have 4m^{2}of the space on the ground and 20m^{3}of air to breath.Find the height of the cone.

Let the radius of the conical text be *r* and height be *h*.

Space on the ground in the tent = π*r*^{2}

Volume of tent = Air needed for breathing

[From equation (1)]

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