Question

It takes 2s for a sound wave to travel between 2 fixed points when the day temperature is 10${}^o$ C . If the temperature rises to 30${}^o$ C , the sound wave travels between the same fixed points in

• A. 1.9 s
• B. 2 s
• C. 2.1 s
• D. 2.2 s

Answer 1

The correct option is A 1.9 s

Here, we know that as the Temperature increases, the speed of sound wave also increases.

And speed is inversely proportional to time, $s\propto \frac{1}{t}$, and therefore time reduces.