The density of a solid ball is to be determined in an experiment. The diameter of the ball is measured with a screw gauge, whose pitch is 
and there are 50 divisions on the circular scale. The reading on the main scale is 
and that on the circular scale is 20 divisions. If the measured mass of the ball has a relative error of 
, the relative percentage error in the density is
Text Solution
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Least count 
Diameter of ball, 
Density, 
Percentage error in density,
Problem Ensure consistent units are used
Solving
Tactics throughout of the calculations to avoid errors.
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