Hose A can fill a tank in 5 minutes, and Hose B can fill the same tank

Hose A can fill a tank in 5 minutes, and Hose B can fill the same tank in 6 minutes. How many tanks would Hose B fill in the time Hose A fills 6 tanks? A. 3 B. 4 C. 5 D. 5.5 E. 6