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A ring is made of aluminium alloy of coefficient of linear expansion 1•6×10^-5 k^-1 is...

A ring is made of aluminium alloy of coefficient of linear expansion 1•6×10^-5 k^-1 is to feet around a hub made of steel at 25°c when the hub as the diameter of 10•00 cm exactly,the diameter of the ring is less by 0•1mm. To what temperature must the two be heated to such that the ring just slips over the hub? Coefficient of steel linear expansion 1•2×10^-5 k^-1?
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