Question

An echo repeats two syllables.If the velocity of sound is 330 m/s , then the distance of the reflecting surface is-

a) 66.0 m

b) 33.0 m

c) 99.0 m

d) 16.5 m

Answer 1

@amistre64 @TuringTest @hartnn @ganeshie8 @ghazi @theyatin

Answer 2

i am not sure about this , but possibly its 66 m

Answer 3

yaa its right!!!

Answer 4

how do you do this? @ghazi

Answer 5

@mayankdevnani

Answer 6

no answer is wrong it gets 16.5m @theyatin

Answer 7

@ganeshie8 @geerky42 @Aperogalics

Answer 8

oops then i must sleep. . .

Answer 9

oh!!!! koi baat nahi

Answer 10

this will help you http://in.answers.yahoo.com/question/index?qid=20120713012737AAWgHSc

Answer 11

can you explain the concept of syllable??

Answer 12

i don't know what is syllable??

Answer 13

@hartnn @ash2326 @jazy @agreene

Answer 14

@TuringTest

Answer 15

well its very tough i see it as if minimum frequency gets us time t=0.05s minimum
and as we have 2 syllables 0.05*2=0.1 ( as i have studied in link given by gazi)
so the distance must be velocity* time=33meter
but to strike wall and come back it becomes 66 as total. . .
but here question is asking for the distance of surface so i am not quite sure. . .

Answer 16

@amistre64 @AccessDenied @ash2326 @dumbcow @hartnn @UnkleRhaukus @Callisto

Answer 17

@Shane_B @surdawi @AccessDenied @ajprincess @Yahoo!

Answer 18

@henpen

Answer 19

im assuming the question is saying that you hear your echo 2 times

Answer 20

You need the time between the 2 sounds

Answer 21

yey!!! that justifies my answer 16.5m which when multiplied by 4 gets an answer of 66m
again explaining it. . .
we can hear minimum 20hz that leads to T=0.05sec
and thus the distance leads to velocity * time = 330 * 0.05=16.5
thus when multilied by 4 gets 66m. . .

Answer 22

why we multiplied it by 4 @theyatin @amistre64 @henpen

Answer 23

the distance traveled between the "wall" and the source is quadrupled in order to hear the echo twice, as i pictured it up. assuming that im reading the question correctly to begin with

Answer 24

oh!!! i see

Answer 25

imagine you and a friend throwing a ball back and forth; how far does the ball travel relative to your positions if you catch it 2 times and throw it 2 times?

Answer 26

i think 4 times. right

Answer 27

correct

Answer 28

thnx... @amistre64

Answer 29

hope its the right concept ;) good luck

Answer 30

what is syllables???

Answer 31

im thinking that it pertains to the rebound that you hear. and not really referencing words perse

Answer 32

oh!!!

Answer 33

if you stand in an echoy place and give a brisk woot!! you can hear how many times it echos back at you

Answer 34

one of them old dead scientist guys used a long hallway that he knew the length of in order to estimate the speed of sound that way