09-10-2021 Answers

 1.A pipe can-> 24 hours

2.A pipe can empty-> 4 hours

3.A tap can-> 4(4/9) hours

4.A tank is normally-> 15 hours

5.A tap can fill-> 9 hours

6.Tap 'A' can->  31(11/19) minutes

7.A cistern is normally-> 40 hours

8.Pipes A,B-> 12(6/13) hours

9.Pipes A,B-> 32 hours

10.A tap can-> 16 hours

11.Taps A,B and C-> 40 hours

12.Pipes A and B 20-> 16 minutes

13.Pipes A,B and C-> 3(9/13) hours

14.One tap can-> 6 hours

15.Two pipes A and B-> 30 minutes

16.Pipes A and B-> 4 hours

17.A tap can-> 8(4/7) hours

18.A water tank-> 54.55 mins

19.Pipes A and B-> 24 hours

20.Two taps-> 1 hour

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