In the following question, two statements are numbered as A and B. On solving these statements, we get quantities A and B respectively. Solve both quantities and choose the correct option.

Quantity A: There are two inlet pipes A, B and two outlet pipes C, D. B takes 7 hours more to fill the tank when compared to A. Two outlet pipes when working together can empty the tank in 3.5 hours and efficiency of both the pipe is same if all of them working together can empty  the tank in 14 hours. Calculate the time taken by A to fill the tank.

Quantity B: The ratio of efficiencies of two pipes A and B is in the ratio 2 ∶ 3 and that of pipe B and C is 3 ∶ 1. Pipe A and B are inlet pipes, pipe C is outlet pipe working together they can fill the tank in 7.5 hours. Calculate the time taken by A to fill the tank when working alone.