Question
Pipe A alone fill the tank in x hours and Pipe B alone
fill the tank in (x – 7) hours. If the efficiency of pipe B is double of pipe A and pipe A fill the tank is 45 liters per hour, then what is the capacity of the tank?Solution
Pipe A alone fill 45 liters per hour, so Pipe B alone fill 90 liters per hour. Capacity of the tank = T => T/45 – T/90 = x – (x – 7) => 2T – T = 630 => T = 630 liters
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