Question

a sound was has a frequency 2HZ and wave length 40cm. How long will take to travel 1.6km.

Answer 1

Ans.

Frequency = 2 Hz
Wavelength = 40 cm

So, speed = frequency × wavelength
= 2 × 40 cm/s
= 80 cm/s
= (80/100000) km/s
= 0.0008 km/s

So, to travel 1.6 km, it will take
(1.6/0.0008) s
= 2000 s
= 33 min 20 s