A boy standing 408m from a wall blew a trumpet and heard the echo 2.4s later. Calculate the speed of the sound
- 310m/s
- 320m/s
- 330m/s
-
340m/s
The correct answer is: D
Explanation
The distance to the wall is 408m, so the total distance (D) traveled by the sound is: D = 2 × 408m = 816m
But v = \(\frac{d}{t}\) = \(\frac{816}{2.4}\) = 340m/s
There is an explanation video available .