The length of the longest pole that can be kept in a room (12 m × 9 m ×8 m) is

Question:

The length of the longest pole that can be kept in a room (12 m × 9 m ×8 m) is
(a) 29 m
(b) 21 m
(c) 19 m
(d) 17 m

Solution:

(d) 17 m
Length of the longest pole that can be kept in a room =Length of the diagonal of the room

$=\sqrt{l^{2+} b^{2}+h^{2}} \mathrm{~m}$

$=\sqrt{(12)^{2}+(9)^{2}+(8)^{2}} \mathrm{~m}$

$=\sqrt{289} \mathrm{~m}$

$=17 \mathrm{~m}$

 

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