Pipe A and B can fill a tank in 24 hours and 30 hours respectively, however pipe C can empty it in x hours. Pipe A and B are opened for 10 hours and then pipe C is opened. If, tank is emptied in 90 more hours, then find the value of x.

Pipe A and B can fill a tank in 24 hours and 30 hours respectively, ho

1.	Pipe A and B can fill a tank in 24 hours and 30 hours respectively, however pipe C can empty it in x hours. Pipe A and B are opened for 10 hours and then pipe C is opened. If, tank is emptied in 90 more hours, then find the value of x.
A.	15
B.	12
C.	18
D.	20
Answer» C. 18

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Pipe A and B can fill a tank in 24 hours and 30 hours respectively, however pipe C can empty it in x hours. Pipe A and B are opened for 10 hours and then pipe C is opened. If, tank is emptied in 90 more hours, then find the value of x.

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