Question

a child hears echo from a cliff 4 seconds after the sound from a powerful cracker is produced.How far away is the cliff from the child?Given that the speed of sound is 340m/s

Answer 1

Hi friend
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Your answer
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TIME TAKEN FOR ECHO TO RETURN = 4 SECONDS

SPEED OF SOUND GIVEN = 340m/s

DISTANCE OF CLIFF FROM CHILD=
$\frac{340 \times 4}{2} = 680m$
THEREFORE,
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DISTANCE OF CLIFF FROM THE CHILD IS 680 METERS.

HOPE IT HELPS

#ARCHITECTSETHROLLINS

Answer 2

Time taken by the sound to reach the cliff = 4/2 = 2 sec

Speed of sound in air = 340m/s

Distance of the cliff = Speed * time

= 340 * 2

= 680 m