Answer:
0.239seconds
Step-by-step explanation:
Using the formula for calculating the distance between the worker (source) and the reflector (ground) expressed as shown:
2x = vt where:
x is the distance between the source and the reflector
v is the velocity of sound in air
t is the time taken by is shout warning to reach the ground
Given parameters
x = 40.0m
v = 335m/s
Required
The time taken by is shout warning to reach the ground
Using the formula 2x = vt
t = 2x/v
t = 2(40)/335
t = 80/335
t = 0.239seconds
Hence it will take 0.339 seconds for his shout warning to reach the ground