The length of longest pole that can be kept in a room 12 m long, 9 m broad and 8 m high is

15 m

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12 m

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17 m

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None of the above

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Solution

The correct option is C 17 m
Length of largest pole = $\sqrt{12^{2} + 9^{2} + 8^{2}} m$
$\Rightarrow \sqrt{289} m \Rightarrow 17 m$

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