In a vernier callipers, there are 10 divisions on the vernier scale and 1 cm on the main scale is divided in 10 parts. While measuring a length, the zero of the vernier lies just ahead of 1.8 cm mark and 4th division of vernier coincides with a main scale division FInd the length.

Explanation

To find the length using the vernier calipers, we will follow these steps:

### Step 1: Identify the Main Scale Reading (MSR)
The problem states that the zero of the vernier scale lies just ahead of the 1.8 cm mark on the main scale. Therefore, the Main Scale Reading (MSR) is:
\[ \text{MSR} = 1.8 \, \text{cm} \]

### Step 2: Determine the Least Count (LC) of the Vernier Calipers
The problem mentions that there are 10 divisions on the vernier scale and that 1 cm on the main scale is divided into 10 parts. The least count (LC) of the vernier calipers can be calculated as:
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