A directs B to sell a rsquo s estate B on looking over the estate before selling it finds a mine on ...........

A directs B to sell a’s estate. B on looking over the estate before selling it, finds a mine on the estate which is unknown to A. B informs A that he wishes to buy the estate for himself, but conceals the discovery of mine. A allows B to buy the estate in ignorance of the existence of mine. Can A repudiate the sale on discovering that B knew of the mine at the time he bought the estate?     (5 marks)