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Brass plate at $30^{\circ} C$ and steel plate at $20^{\circ} C$ have equal area. $α$ of brass $= 18 \times 10^{- 6} /^{0} C, α$ of steel $= 12 \times 10^{- 6} /^{0} C$ . The common temperature at which both will have equal area is

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0∘C

−2.50C

25∘C

50∘C

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detailed solution

Correct option is D

ΔA1=ΔA2 β1Δt1=β2Δt2

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Brass plate at 30∘C and steel plate at 20∘C have equal area. α of brass =18×10−6/0C, α of steel =12×10−6/0C. The common temperature at which both will have equal area is

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Ready to Test Your Skills?

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Brass plate at $30^{\circ} C$ and steel plate at $20^{\circ} C$ have equal area. $α$ of brass $= 18 \times 10^{- 6} /^{0} C, α$ of steel $= 12 \times 10^{- 6} /^{0} C$ . The common temperature at which both will have equal area is