Question

Plz help.....A student heard the echo of her voice from nearby solid object after 2 sec. how far away is the solid object? The speed of sound in air is 340m/s.

A. 170m

B. 340m

C. 510m

D. 680m

​

Answer 1

B.

340meters per second x 2 seconds = 680 meters away

divided by 2coming back = 340

Hope this helps

Step-by-step explanation: