1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

# Statement 1: Ram is standing at a distance of 33 m from a wall. He claps and hears the echo of his own clap. Statement 2: Velocity of sound in air is 330 m/s and time of persistence for hearing is 110 of a second.

A

Statement 1 is true but information in statement 2 is insufficient to prove it

No worries! We‘ve got your back. Try BYJU‘S free classes today!
B

Statement 1 is true and information in statement 2 is sufficient to prove it

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C

Statement 1 is false but information in statement 2 is insufficient to prove it

No worries! We‘ve got your back. Try BYJU‘S free classes today!
D

Statement 1 is false and information in statement 2 is sufficient to prove it

No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

## The correct option is B Statement 1 is true and information in statement 2 is sufficient to prove it Time taken by the sound of Ram's clap to come back after reflection from the wall is the time taken for sound to travel a distance twice the distance between Ram and the wall. So, t=(2×33)330=15 s. Since t is greater than the time of persistence of hearing (110 s), Ram will hear the echo of his clap. So, statement 1 is true and information in statement 2 is sufficient to prove it.

Suggest Corrections
0
Join BYJU'S Learning Program
Related Videos
Speed of sound
PHYSICS
Watch in App
Explore more
Join BYJU'S Learning Program