1.

In a theodolite, the circular main scale is divided into degrees and each degree is divided into three parts. If the theodolite is to have a least count of 20 seconds, then _____ main scale division is divided into ________ Vernier scale divisions

A. 19, 20
B. 29, 30
C. 49, 50
D. 59, 60
Answer» E.


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