Question

4. Two pipes A and B can fill a tank in 6 and 8 hours respectively. Both the pipes are opened simultaneously. Then in how many hours will the tank be filled ?​

Answer 1

Answer:

20 hours

Step-by-step explanation:

Part filled by A in 1 hour =

36

1

Part filled by B in 1 hour =

45

1

;

Part filled by (A+B) in 1 hour =

36

1

+

45

1

=

180

9

=

20

1

Hence, both the pipes together will fill the tank in 20 hours.

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Answer 2

Answer:

According to me Pipe B was open for 4 hours and hence it filled up 4/6 of the tank. On the other hand B filled up the rest of the 2/6 or 1/3 tank. This will be done in 8/3 hours = 2 hours & 40 minutes.