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Question

The maximum length of a pencil that can be kept in a rectangular box of dimensions  8 cm x 6 cm x 2 cm, is :


Options:
A .  `2sqrt(13) ` cm
B .  `2sqrt(14) ` cm
C .  `2sqrt(26) ` cm
D .  `10sqrt(2) ` cm
Answer: Option C

Required length = `sqrt(8^2 + 6^2 + 2^2) cm `

                             = `sqrt(104) cm`

                             = `2sqrt(26) cm`



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