Up The Ladder

[rajsathya]

Simple and also one of the interview questions:

A man wants to reach a window which is 40ft above the ground. The distance from the foot of the ladder to the wall is 9 feet.
How long should the ladder be ??

[WR1334]

Appln of pythagorean theorem works here! bro
seems like ans is 41

[Bheem]

Take length of the ladder is x then by Pythagoras theoremx²=40²+9^{2
solving we get x=41}