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in Surface Areas And Volumes by (29.9k points)
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The maximum length of a pencil that can be kept in a rectangular box of dimensions 12 cm x 9 cm x 8 cm, is 

A. 13 cm 

B. 17 cm 

C. 18 cm 

D. 19 cm

1 Answer

+1 vote
by (30.3k points)
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Best answer

We know that, 

Length of the diagonal of the cuboid = \(\sqrt{1^2+b^2+h^2}\)

\(\sqrt{12^2+9^2+8^2}\)

\(\sqrt{144+81+64}\)

\(\sqrt{289}\)

= 17 cm 

Therefore, option B is correct

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