Question

A worker lives at a distance of 1.32 km from the factory .If the speed of sound in air be 330m/s, how much time will be sound of factory siren take to reach the worker?

Answer 1

time=distance/speed

1.32km = 1320 m/s (1km = 1000m then 1.32km = 1320m)

Speed of sounf in air = 330 m/s

time = 1320 / 330

time = 4 second

Thus it would take 4 second for the sound of the factory siren to reach the worker.

Answer 2

first of all 1.32 km change into my
1.32km=1320m
speed =distance /time
330= 1320/time
time=1320/330
= 4 sec