A man claps his hands in front of a wall and he hears an echo after 1.6s. He walks. 33m towards wall and hears the echo 1.4 s after clapping. Then velocity of sound in air is:

A man claps his hands in front of a wall and he hears an echo after 1.

1.	A man claps his hands in front of a wall and he hears an echo after 1.6s. He walks. 33m towards wall and hears the echo 1.4 s after clapping. Then velocity of sound in air is:
A.	320 m/s
B.	350 m/s
C.	330 m/s
D.	340 m/s
Answer» D. 340 m/s