**1) Puja Is Going to Visit a Forest With His Father. In This Forest, an Elephant Produces a Sound With a Frequency of 15 Hz. Assuming the Speed of Sound in Air Is 450 m/S, Determine the Wavelength of This Sound Wave.**

Frequency of the sound = 15 Hz

Speed of sound = 450 m/s

Then from the formula of the speed of sound, we have,

Speed = Wavelength × Frequency

From this,

Wavelength Speed/Frequency

Wavelength 450/15m

Wavelength = 30 m

The wavelength of the sound is 30m.

**2) Raja Is Going to Visit a Zoo With His Father. In This Zoo, a Tiger Produces a Sound With a Frequency of 20 Hz. Assuming the Wavelength of This Sound Is 25 m, Determine the Speed of Sound in the Air.**

Frequency of the sound = 20 Hz

Wavelength = 25 m

Then from the formula of the speed of sound, we have,

Speed = Wavelength × Frequency

Speed = (25 × 20) m/s

Speed = 500 m/s

The speed of the sound in the air is 500 m/s.

**3) On a Hot Summer Day, a Pesky Little Mosquito Produced Its Warning Sound Near Your Ear. The Beating of Its Wings produces the Sound. Assuming the Speed of the Sound Is 300 m/S and the Wavelength of the Sound Wave Is 10m, Determine the Frequency**

The wavelength of the sound wave = 10 m

Speed of sound = 300 m/s

Then from the formula of the speed of sound, we have,

Speed = Wavelength × Frequency

From this,

Frequency= Speed/Wavelength

Frequency= 300/10Hz

Frequency = 30 Hz

So, the Frequency of the sound is 30 Hz.

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