A tank can be filled in 30 minutes. There is a leakage which

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A tank can be filled in 30 minutes. There is a leakage which can empty the tank in 90 minutes. Therefore, the tank will be filled in

[RRB NTPC 31 March 2016 Shift 2]

A 60 minutes

B 45 minutes

C 55 minutes

D 50 minutes