Question

A man is standing at a distance of 850 from a sound reflecting surface class loudly if the velocity of the sound in air is 340 M per second then the time taken by the way to reach is ???????​

Answer 1

Answer:

2.5 second

Explanation:

time = distance/speed

= 850/340

=2.5second

Answer 2

Answer:

5 seconds

Explanation:

Plotting:

Speed=340 m/s

Distance=850 m

Time=??=t

We know,

Speed=2*Distance/Time

340=2*850/t

340=1700/t

t=1700/340

t=170/34

t=5 s

Note: speed=2d/t because the sound has to reflect and come back which counts for twice the distance.