Q

A sound wave travels at 340 m/s with wavelength 2 cm. What is its frequency?

RRB Group-D 12/10/2018 (Shift-III) 2018
✓ Answer: A 17000 Hz
f = v/λ = 340/0.02 = 17000 Hz. Options A and C are identical in the source; the printed key selects A.
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