A student measured the length of a rod and wrote it as 2 30

Last updated: 6/13/2023

A student measured the length of a rod and wrote it as 2 30 cm Which instrument did he use to measure it 1 A meter scale 2 A screw gauge having 50 divisions in circular scale and pitch as 1 mm 3 A Vernier calliper where 10 divisions in Vernier scale matches with 9 divisions in main scale and main scale has 10 divisions in 1 cm 4 A screw gauge having 100 divisions in circular scale and pitch as 1 mm