Exams › SSC CGL (Prelims) › GK

How long will a sound wave take to travel 1.5 km, if its frequency is 5 kHz and wavelength is 6 cm?

1. 2.5 seconds
2. 50 seconds
3. 5 seconds
4. 25 seconds

Correct answer: 5 seconds

Solution

The speed of a wave is given by $v=f\lambda$. Here, $f=5000\,\text{Hz}$ and $\lambda=0.06\,\text{m}$, so $v=300\,\text{m/s}$. Time taken to travel $1.5\,\text{km}=1500\,\text{m}$ is $t=1500/300=5$ seconds.

Related SSC CGL (Prelims) GK questions

• Gangubai Hangal belonged to the ________.
• The first Indian woman to hold the Under-20 World Wrestling Championship is _________.
• Which part of the Indian Constitution deals with the election of the Vice President?
• In which of the following games is the Baulk Line used?
• What is the economic justification for subsidies in the agriculture sector?
• The Environment (Protection) Act, 1986 empowers the ______ to establish authorities charged with the mandate of preventing environmental pollution in all its forms.

⚔️ Practice SSC CGL (Prelims) GK free + battle 1v1 →