The+Rose+Garden

At Mrs Usher's house a few years ago a retaining wall was built.
 * The Rose Garden **



A rose garden was planted behind it. Over the years the soil has compacted and dropped down, leaving an unsightly gap.



I would like to fill the garden back up with a combination of layered newspaper (to stop weeds) some soil and mulch.

The garden is in two symmetrical parts. One half is about 10m long and 1m wide. At the end there is a 2m square section.

In cubic metres, how much of each component will I need?

More importantly, how will you work it out? It is your working out strategy rather than your answer than we are most interested in here. (Of course, a total number will be very handy when ordering the products!)

Think Hard!