A) 660m
B) 990m
C) 1320m
D) 1950m
Correct Answer: C
Solution :
Echo is defined as the reflection of a sound wave back to its source in sufficient strength and with a sufficient time lag to be separately distinguished. \[\text{Time = }\frac{\text{distance}}{\text{speed}}\] Given that first echo is heard after 3 s, hence time taken for the echo to travel from first cliff to man isYou need to login to perform this action.
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