Working Out Quantities

Bark is usually laid at 5 to 10cm thick in gardens to suppress the growth of weeds.
E.g. 5m wide x 12m long (dimension) = 60m2 (area) x .10cm (depth) = 6m3 Volume required
or5m wide x 12m long (dimension) = 60m2 (area) x .05cm (depth) = 3m3 Volume required

Stones
Stones are usually laid at 5cm depth.
E.g. 5m wide x 12m long (dimension) = 60m2 (area) x .05cm (depth) = 3m3 Volume required