 
<translate> Ọrụ tankị ahụ rụrụ n'otu awa = (1/2 - 1/3) = 1/14 Leak ga-eme ka tankị ahụ gwụ n'ime awa iri na anọ. Azịza ya bụ: (D). <eng> Work done by the tank in 1 hour = (1/2 - 1/3) = 1/14 Leak will empty the tank in 14 hrs.
The final answer: (D). 