Copyright © University of Cambridge. All rights reserved.

'Ladder and Cube' printed from http://nrich.maths.org/

Show menu


A cube (1 metre by 1 metre by 1 metre) has one face on the ground and one face pressed up to a wall. A ladder, 4 metres long, is leaning against the wall and it just touches the cube. How high is the top of the ladder above the ground?