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                                    A person measures the depth of a well by measuring the time interval between dropping a stone and receiving the sound of impact with the bottom of the well. The error in his measurements of time(△ T) is 0.01 second and he measures the depth of the well to be equal to 20 m. Take acceleration due to gravity equal to 10 m/s² and velocity of sound to be equal to 300 metres per second, then find the fractional error in the measurement of length , △ L/L in percentage | 
                            
| Answer» A person measures the depth of a well by measuring the time interval between dropping a stone and receiving the sound of impact with the bottom of the well. The error in his measurements of time(△ T) is 0.01 second and he measures the depth of the well to be equal to 20 m. Take acceleration due to gravity equal to 10 m/s² and velocity of sound to be equal to 300 metres per second, then find the fractional error in the measurement of length , △ L/L in percentage | |