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A cylindrical steel plug is inserted into a circular hall of diameter 2.60cm in a brass plate. when the plug and the plates are at a temp. of 20^0c the diameter of the plug is 0.010cm smaller than that of the hole. The temp at which the plug just fit in it is-

Option: 1

-48^{\circ} \mathrm{C}


Option: 2

-20^{\circ} \mathrm{C}


Option: 3

-10^{\circ} \mathrm{C}


Option: 4

-458^{\circ} \mathrm{C}


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