A vernier callipers is used to measure the width and the length of a rectangular plate. The measured values are 1.38 cm and 4.02 cm respectively.Find the uncertainly in the value of its area.

Explanation

To find the uncertainty in the area of a rectangular plate measured using a vernier caliper, we follow these steps:

### Step 1: Identify the measured values
The measured values given are:
- Width (breadth) \( B = 1.38 \, \text{cm} \)
- Length \( L = 4.02 \, \text{cm} \)

### Step 2: Calculate the area using the measured values
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