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what is the cylinder depth?
mm
ok

Explanation:

Step1: Determine the main scale reading

The main scale of the vernier caliper shows \( 50\) mm.

Step2: Determine the vernier scale reading

The vernier scale has a least - count of \( 0.05\) mm. The \( 0\) th mark of the vernier scale coincides with a mark on the main scale. So the vernier scale reading is \( 0\times0.05 = 0\) mm.

Step3: Calculate the total reading

The total reading of the vernier caliper (which gives the depth of the cylinder) is the sum of the main scale reading and the vernier scale reading. Using the formula \( D = M+V\), where \( M\) is the main scale reading and \( V\) is the vernier scale reading. Substituting \( M = 50\) mm and \( V = 0\) mm, we get \( D=50 + 0=50\) mm.

Answer:

\( 50\)