Question

Find the length of the largest pole that can be placed in a hall 10m long,10m wide and 5m high.

Answer 1

5m.

Because it is the maximum height or it is height of hall.

Answer 2

Length of hall, l = 10m
Breadth of hall, b = 10m
and Height of hall, h = 5m

Length of largest pole which can be placed in this hall = Length of diagonal of the hall

= √l² + b² + h²
= √10²+10²+5² 
= √100+100+25
=√225
= 15 m

Hence, 
Length of largest pole which can be placed in this hall = 15 m