12 water pumps can make a water tank empty in 20 minutes. But 2 pumps are out of order. How long will the remaining pumps take to make the tank empty...? Mcqs

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12 water pumps can make a water tank empty in 20 minutes. But 2 pumps are out of order. How long will the remaining pumps take to make the tank empty...?

(i) 20 minutes
(ii) 24 minutes

(iii) 28 minutes
(iv) None of these



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