Question

The length of the longest pole that can be put in a room of dimensions 10 m $\times$ 10 m $\times 5m$.

• A. $15m$
• B. $16m$
• C. $10m$
• D. $12m$

Answer 1

The correct option is A $15m$

The longest pole is the diagonal of the cuboidal room which is given by $\sqrt{l^2+b^2+h^2}$

$\Rightarrow \sqrt{{10}^2+{10}^2+5^2}=\sqrt{100+100+25}=\sqrt{225}=15m$

$\therefore$ Length of the longest pole is $15m.$