The volume of a metal block changes by 0.18% when it is heated through 20 °C. Its coefficient at cubical expansion will be
The volume of a metal block changes by 0.18% when it is heated through 20 °C. Its coefficient at cubical expansion will be
(A) 9 × 10-5 / °C
(B) 3 × 10-5 / °C
(C) 18 × 10-5 / °C
(D) 36 × 10-5 / °C
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