Question

The speed of sound in air is about 330m/s. Express this speed in km/h. How long will the sound take to travel in 99km? ​

Answer 1

Answer:

5min  Or 300 Seconds

Step-by-step explanation:

To convert metre into km, Divide it by 1000                    (1000m = 1 km)

To Convert Second into Hour, Divide it by 60 × 60         (I hour = 3600 Sec)

GIVEN , The speed of sound in air = 330m/s.

⇒330 m/s = $= \frac{\frac{330 }{ 1000}}{\frac{1}{60* 60} }$ = $\frac{330}{1000}$ × 3600= 1118Km/h

Now, Time taken By sound to cover 99km = $\frac{Distance}{Speed}$ = $\frac{99km}{1118km/h}$ = $\frac{1}{12} Hours$

                                                                         = $\frac{1}{12}$ × 60 = 5minutes

                                                                         = 5 × 60= 300 Seconds

  THANK U : )