Answer:
v = 340 m/s
Step-by-step explanation:
The speed of light and the temperature follows the following relation as :
.............(1)
It is given that the atmospheric temperature is 15 Celsius. Put the value of T in above equation as :

v = 340 m/s
So, the speed of sound travelling from the flute is 340 m/s. Hence, this is the required solution.