Directions: Read the following information carefully and answer the questions given below.

There are four pipes namely A, B, C and D and four taps namely P, Q, R and S in a tank and each can fill it in a different number of hours. Q can alone fill the tank in 24 hours. Number of hours taken by C alone to fill the tank is 25% more than the number of hours taken by Q alone to fill the tank. The ratio of the number of hours taken by C alone and A alone to fill the tank is 3:4 respectively. Number of hours taken by A alone to fill the tank is 100% more than the number of hours taken by P alone to fill the tank. The efficiency of P alone is 50% more than the efficiency of S alone. The respective ratio of the number of hours taken by A alone, B alone and R alone is 5:4:2 respectively. Number of hours taken by D alone to fill the tank is 50% more than the number of hours taken by R alone to fill the tank.