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a girl claps and hears the Echo after reflection which is 990m away.If the velocity of sound is 330m/sec.Calculate the time taken |
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Answer» Answer: 6sec Explanation: DISTANCE =990m speed=330m/s speed=distance/time so,time=distance/speed time=990/330 time=3sec as she HEARS the echo after REFLECTION the time will be 2 times so 3×2=6sec |
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