The speed of sound in air is 332 mis. A man stands 249 m from a large flat wall, as shown in the diagram below, and claps his hands once.

a. Calculate the interval (in s) between the time when the man claps his hands and the time when he hears the echo from the wall.

b. A woman is standing 249 m further away from the wall than the man. She hears the clap twice, once directly and once after reflection from the wall. How long after the man claps does she hear these two sounds? Choose your two answers from the following:

0.75 s

1.50 s

2.25 s

3.00 s

Transcribed Image Text:

woman man 249 m 249 m