some precautions while using metre scale
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State the precautions which should be taken while using a metre scale to measure the length of an object.
Keep the ruler exactly along the length to be measured.
Avoid using worn out portions of the ruler.
Keep the eye vertically above the point where the measurement is to be taken.
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Two precautions are :
(i) The initial point of distance must coincide with the zero reading of meter scale.
(ii) The eye should be kept in line with the point of measurement.
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