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    5. A person rings a metallic bell near a strong concrete wall. He hears the echo after 0.3 s. if the so

    Question

    A person rings a metallic bell near a strong concrete

    wall. He hears the echo after 0.3 s. if the sound moves with a speed of 340 m/s, how far is the wall from him? 
    A 102 m Correct Answer Incorrect Answer
    B 11 m Correct Answer Incorrect Answer
    C 51 m Correct Answer Incorrect Answer
    D 30 m Correct Answer Incorrect Answer

    Solution

     Let the distance is x metre. Distance = Velocity × Time x = 340 × 0.3 = 102 metre (This is the total distance) 

    Practice Next
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