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Three solid objects of the same material and of equal mass-a sphere, a cylinder (length = diameter) and a cube are at 500°C initially. These are dropped in a quenching bath containing a large volume of cooling oil each attaining the bath temperature eventually. The time required for 90% change in temperature is the smallest for_________________?
A. CubeCorrect Answer
B. Cylinder
C. Sphere
D. Equal for all the three
Correct Option: A. Cube
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