Answer:
v = 215.207 m/s
Explanation:
given,
distance between center of condensation and the center of adjacent refraction (λ) = 70.10 cm = 0.7010 m (∵ 1 cm = 0.01 m))
frequency = 307.0 Hz
to calculate how fast the wave is moving
V = ν λ
v = 307.0 × 0.7010
v = 215.207 m/s
hence, the wave is moving with velocity of v = 215.207 m/s