# Q.1.    An echo is heard in 3 s. What is the distance of the reflecting surface from the source, given that the speed of sound is ?

Given the speed of sound is .

The time taken by the sound to travel from the source to the reflecting surface will be half of this time:

Hence,

Substituting the values in the equation, we get the distance,

## Related Chapters

### Preparation Products

##### JEE Main Rank Booster 2021

This course will help student to be better prepared and study in the right direction for JEE Main..

₹ 13999/- ₹ 9999/-
##### Rank Booster NEET 2021

This course will help student to be better prepared and study in the right direction for NEET..

₹ 13999/- ₹ 9999/-
##### Knockout JEE Main April 2021 (Easy Installments)

An exhaustive E-learning program for the complete preparation of JEE Main..

₹ 4999/-
##### Knockout NEET May 2021

An exhaustive E-learning program for the complete preparation of NEET..

₹ 22999/- ₹ 14999/-