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A massive stone pillar 20 m high and of ...

A massive stone pillar `20 m` high and of uniform cross section rests on a rigid base and supports a vertical load of `5.0 xx 10^(5)N` at its upper end. If the compressive stress in the pillar is not exceed `16 xx10^(6)N//m`, what is the minimum cross-sectional area of the pillar? (Density of the stone `=2.5xx10^(3) kg//m^(3)` take `g= 10 N//kg)`

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