Pipes A and B can empty a full tank in 16 hours and 14 hours, respectively. Pipe C alone can fill the empty tank in 4
hours. If A, B and C are opened together, the tank will be 35% full after:

A

$$3\frac{1}{5}$$ hours

B

$$3\frac{2}{5}$$ hours

C

$$2\frac{2}{5}$$ hours

D

$$2\frac{1}{5}$$ hours