The length of the longest flag pole that can be put in a store room of dimensions 10m × 10m × 5m is 

A) 16m 

B) 10m 

C) 12m 

D) 15m

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2 Answers

Correct option is (D) 15m

Length of the longest pole = Length of diagonal of cuboid

\(=\sqrt{l^2+b^2+h^2}=\sqrt{10^2+10^2+5^2}\)

\(=\sqrt{100+100+25}=\sqrt{225}\)

= 15 m

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Correct option is  D) 15m

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