what precation should be taken while measuring length ?
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The precautions to be taken while using a meter scale to measure lengths are as follows : (1) The scale should be placed to the side of the object being measured. It should also be in touch with the object being measured. (2) While reading the scale, eye must be placed vertically above the scale mark being read.
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Place the ruler in contact with object along its length.
If the zero mark is not clear use any other full mark of the scale, subtract reading of this mark from the reading at other end. ...
Your eye must be exactly in front of the point where the measurement is to be taken.
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