Question
Physics Question on sound
The minimum distance to hear a clear echo is (V is the velocity of sound)
A
2V/5
B
5V/2
C
V/20
D
5V
Answer
V/20
Explanation
Solution
Answer (c) V/20
The minimum distance to hear a clear echo is (V is the velocity of sound)
2V/5
5V/2
V/20
5V
V/20
Answer (c) V/20