RRB ALP 10th Aug 2018 shift-1 Question 69

Question 69

Sound travels at a speed of 333 $$ms^{-1}$$ in the air; thus, in 1 s, a distance of 333 m is travelled by:


Sound travels in mechanical waves. A mechanical wave is a disturbance that moves and transport energy from one place to another place through a medium. In sound , disturbance is a vibrating object. It means that sound can travel through air, gasses, liquid etc. 

So, Option B is correct answer.

Create a FREE account and get:

  • Download RRB Study Material PDF
  • 45+ RRB previous papers with solutions PDF
  • 300+ Online RRB Tests for Free


Register with


Boost your Prep!

Download App