MPSC PYQScienceSound Numericalenglish

Bat: f = 30 kHz, v = 350 m/s, echo after 0.6 s. Distance and wavelength?

A.105 m, 11.7×10⁻³ m
B.220 m, 23×10⁻³ m
C.140 m, 11.7×10⁻³ m
D.115 m, 23×10⁻³ m

Correct answer: A

Source paper

Science: Sound (Numerical)

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