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RRB Assistant Loco Pilot and Technician Model Paper 17 with key

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Question : 45

Total: 75

A water tank can be filled by atap in 30 minutes and another tapcan fill it in 60 minutes. If boththe taps are kept open for 5 minutesand then the first tap isclosed, how long will it take forthe tank to be full?

30 minutes
45 minutes
20 minutes
25 minutes

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