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An inlet pipe can fill a tank in 10 hour...

An inlet pipe can fill a tank in 10 hours and an outlet pipe can empty the completely filled tank in 20 hours. Both the pipes are opened at 6.30 a.m. When will the tank get filled ?
एक अंतर्गम पाइप किसी टंकी को 10 घंटों में भर सकता है जबकि एक बहिर्गम पाइप पूरी तरह से भरी हुई टंकी को 20 घंटों में खाली कर सकता है | दोनों पाइपों को सुबह 6 : 30 बजे चालू किया जाता है | टंकी कब भर जाएगी ?

A

2.30 a.m. next day/ अगले दिन 2.30 am बजे

B

2 a.m. next day/ अगले दिन 2 a.m. बजे

C

1 a.m. next day/ अगले दिन 1 a.m. बजे

D

12:00 midnight/ मध्यरात्रि 12:00 बजे

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