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A boy measures the length of a piece of ...

A boy measures the length of a piece of pencil by metre rule, vernier callipers and screw gauge to be 1.2 cm, 1.24 cm and 1.243 cm respectively. State the accuracy in each measurement .

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To determine the accuracy of the measurements taken by the boy using different measuring instruments, we need to identify the least count of each instrument. The least count is the smallest value that can be measured accurately by the instrument. ### Step-by-Step Solution: 1. **Measurement with Meter Rule:** - The boy measures the length of the pencil as 1.2 cm using a meter rule. - The least count of a meter rule is typically 0.1 cm. - Therefore, the accuracy of the measurement using the meter rule is **±0.1 cm**. ...
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