in an experiment to determine the radius of a chalk by screw gauge, the diameter is measured and readings are d1 = 1.002 cm, d2 = 1.004 cm and d3 = 1.006 cm. select the correct alternatives:in an experiment to determine the radius of a chalk by screw gauge, the diameter is measured and readings are d1 = 1.002 cm, d2 = 1.004 cm and d3 = 1.006 cm. select the correct alternatives: