A barometer tube of length 90 cm contain...

A barometer tube of length 90 cm contains some air above mercury. The reading of the mercury level is 74.8 cm when the atmospheric pressure is 76 cm and temperature is `30^@C`. If the reading is observed to be 75.4 cm on some another day when temperature is `10^@C`, then what will be true pressure?

74.25 cm

75.65 cm

76.57 cm

77.26 cm

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