A local authority is to build a new facility for the storage of up to 5000T of rock salt for the de-icing of roads over the winter period. Due to space restrictions on the site it has been decided to make the structure as an "ovoid" type shell roof, as shown below. If the shell roof is 150 mm thick calculate the volume of concrete required. If the density of rock salt is
2.1(T)/(m)3
, will the structure fulfil the local authority's requirements?