## False Ceilings

#### Problem

A company that specialises in fitting false ceilings uses a design based on 1m^{2} ceiling tiles arranged in a grid.

Each tile is supported by metal strips that slot together.

Find the total length of metal strips required to fit this design in a room measuring 3 m by 4 m.

Problem ID: 59 (Dec 2001) Difficulty: 1 Star