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Approximation Methods

A pencil is p...

Question

A pencil is placed next to a ruler such that the ends of the pencil are at $6.2 c m$ and $13.7 c m$ markings on the ruler. What is the length of this pencil?
7.5

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Solution

The correct option is A 7.5
The length of the pencil can be calculated as the difference in the readings marked on the ruler. Hence, the length of the pencil is:
$\Rightarrow 13.7 - 6.2 = 7.5 c m$

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