Question

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

Options

• 29 m

• 21 m

• 19 m

• 17 m

Answer 1

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 m)`

`= sqrt((12)^2 + (9)^2 + (8)^2 "m")`

`= sqrt(289)  "m"`

`= 17 "m"`