A student measured the length of a wire and wrote it as 2.50 can which instrument did he/she use to measure it?

A student measured the length of a wire and wrote it as 2.50 can which

1.	A student measured the length of a wire and wrote it as 2.50 can which instrument did he/she use to measure it?
Answer» a screw gauge having 50 division in the circular scale and pitch as 1 mm. a meter scale a VERNIER caliper where the 10 division in vernier matches with a division in main scale. a screw gauge having 100 division in the circular scale and pitch as 1 mm. Solution :To get accuracy.