Here is a link to the solubility in hot and cold water. Being an acid, it is very soluble in NaOH. From the link on solubility in water you should be able to make an educated guess as to the solubility in cold/hot HCl.
http://en.wikipedia.org/wiki/Benzoic_acid
is benzoic acid soluble in water, 1.0M NaOH, 1.0M HCl?
2 answers
its semi soluble.... it only dissolves if heated