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The length of the longest pole that can be placed in a room 12 m long and 9 m wide and 8 m high is?

12 m
14 m
17 m
21 m

Correct Answer: 17 m

Explanation:

Length of longer rod = √l² + b² + h²
= √12² + 9² + 8²
= √144 + 81 + 64
= √289
= 17 m

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