Q

At 25°C: A. Sound speed in aluminium is 6220 m/s. B. Sound speed in nickel is 6040 m/s. Which is true according to the source table?

RRB Group-D 15/10/2018 (Shift-II) 2018
✓ Answer: C Only B
The source table gives aluminium as 6420 m/s and nickel as 6040 m/s, so only B matches.
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