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A barometer is faulty . When the true ba...

A barometer is faulty . When the true barometer reading are `73` cm and `75` cm of Hg , the faulty barometer reads `69` cm and `70` cm respectively (i) What is the total length of the barometer tube? (ii) What is the reading when the faulty barometer reads `69.5`cm? (iii) What is the faulty barometer reading when the true barometer reads `74`cm?

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