Q. 345.0( 2 Votes )

The length of the A. 29 m

B. 21 m

C. 19 m

D. 17 m

Answer :

Given: A room with dimensions (12 m × 9 m × 8 m)


Room is in the shape of a Cuboid.
Longest rod that can be placed in a room is nothing but its diagonal.
Let length of the rod be ‘L’.


Length of diagonal of a Cuboid = √(l2 + b2 + h2)


L = √(l2 + b2 + h2)


L = √(122 + 92 + 82) m
L= √(144 + 81 + 64) m
L = √289 m
L = 17 m
The length of the longest rod is 17 m

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