If the volume of a block of metal changes by 0.12 \% when it is heated through 20^{\circ} C, the coefficient of linear expansion (in { }^{\circ} C ^{-1} ) of the metal is x \times 10^{-5}, find the value of x ?

JEE Main 2026 Model Paper 1

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If the volume of a block of metal changes by 0.12% when it is heated through 20∘C, the coefficient of linear expansion (in ‌∘C−1 ) of the metal is x×10−5, find the value of x ?

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