A) \[2787{}^\circ C\]
B) \[2772{}^\circ C\]
C) \[2529{}^\circ C\]
D) \[2802{}^\circ C\]
Correct Answer: D
Solution :
Rim will slip if its diameter increases to 30 cm. Hence \[\Delta l=0.1\,cm\] |
\[\Delta T=\frac{\Delta l}{l\times a}=\frac{0.1}{29.9\times 1.2\times {{10}^{-5}}}={{2787}^{o}}C\] |
Rim to be heated to temperature |
\[2787+15={{2802}^{o}}C\] |
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