A source of sound is placed at one end of an iron bar 2km long and two sounds are heard - Science - Sound

Question

A source of sound is placed at one end of an iron bar 2km long
and two sounds are heard at the other end at an interval of 5 6 s
If the velocity of sound in air is 330m/s
1 the time taken by sound to travel 2km in iron is
(A) 0 46s (B) 0 16 s
2 Velocity of sound in iron is
(A) 2348m/s (B)4348m/s

Vijay Yadav · Accepted Answer

Given that Speed of sound in air (Va) = 330 m/s Speed of sound in iron Vi = ? Distance L = 2 km = 2000 m Let t1 = Time taken by sound in air t2 = Time taken by sound in iron Î”t = t1 â€“ t2 = 5 6 s Now, $t_{1} = \frac{L}{V_{a}} = \frac{2000}{330} = 6 065$ (1) t2 = t1 â€“ Î”t = 6 06 â€“ 5 6 = 0 46 s Correct option is (A) (2) $V_{i} = \frac{L}{t_{2}} = \frac{2000}{0 46} = 4348 m/s$ Correct option is (B)