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  1. The length (in metres) of the longest rod that can be put in a room of dimensions 10 m × 10 m × 5 m is
    1. 15√3
    2. 15
    3. 10√2
    4. 5√3
Correct Option: B

Length of the longest rod Diagonal = √10² + 10² + 5² = √225 = 15 metre


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