Question

the maximum length of a pencil that can be kept in a rectangular box of dimensions 12cm×9cm×8cm,is
a)13cm
b)17cm
c)18cm
d)19cm​

Answer 1

Answer:

b)17

Step-by-step explanation:

Maximum length of pencil =

$\sqrt{12 ^{2} } + \sqrt{ {9}^{2} } + \ \sqrt{ {8}^{2} }$

$\sqrt{144 + 81 + 64} \\ = \sqrt{289} \\ = 17$