Steel rod at 40^(@)C is observed to be 1...

Steel rod at `40^(@)C` is observed to be 1 m long when measured by a brass scale which is correct at `0^(@)C`. correct length of the steel rod at `0^(@)C` is `(alpha_("steel")=12xx10^(-6)//1^(@)Candalpha_("Brass")=19xx10^(-6)//1^(@)C)`

99.89 cm

98.99 cm

99.97 cm

89.6 cm

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A steel scale is correct at 0^(@)C . The length of a brass tube measured by it at 40^(@)C is 4.5 m. The correct length of the tube at 0^(@)C is (Coefficients of linear expansion of steel and brass are 11xx10^(-6)//""^(@)Cand19xx10^(-6)//""^(@)C respectively.)

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AAKASH SERIES-THERMAL PROPERTIES OF MATTER-EXERCISE-3

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