Two pipes can fill an empty tank in 1.8 hours and 3 hours respectively – McqOptions

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1.	Two pipes can fill an empty tank in 1.8 hours and 3 hours respectively while a third pipe can empty a tank filled in x hours. If all three pipes are opened simultaneously then an empty tank is completely filled in 2.25 hours. Find the value of x.
A.	2
B.	2.25
C.	1.5
D.	2.5
Answer» C. 1.5

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