A conical tent is to accommodate 77 persons. Each person must have 16 m^3 of air to breathe.
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1/3pi r^2 h=77×16
r^2 ×h=(7×2)^2 ×6
r=14
h=6
r^2 ×h=(7×2)^2 ×6
r=14
h=6
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