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Subject :NSO    Class : Class 8

An echo repeats two syllables. A single syllable takes about 1/5th of a second to utter. If the velocity of sound is 330 m s–1, then the distance of the reflecting surface is

A 66.0 m
B 33.0 m
C 99.0 m
D 16.5 m


Ans 1:

Class : Class 8
Can someone please explain this question?

Ans 2:

Class : Class 9
please explain this question

Ans 3:

Class : Class 8
Time taken to utter single syllable=1/5th of a sSpeed of sound in air=330m s^-1 or 330m/sso distance to reflecting surface=1/5 * 330 as that will give the distance=66.0mSo, distance to reflecting surface is 66.0m

Ans 4:

Class : Class 8
Is the question wrong...? the answer should be 33.0 m as speed=2d/t

Ans 5:

Class : Class 8
please explain this question.

Ans 6:

Class : Class 8

Ans 7:

Class : Class 6
answer??????????????????????????????????????????????????????

Ans 8:

Class : Class 8
please explain this question.

Ans 9:

Class : Class 9

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