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Two pipes A and B can fill a tank in 6 h...

Two pipes A and B can fill a tank in 6 hours and 9 hours respectively. They are opened alternately for 1 hour each, starting with pipe A first. In how many hours will the tank be filled?
दो पाइप A और B किसी टंकी को क्रमशः 6 और 9 घंटे में भर सकते हैं |पाइप A से शुरुआत करते हुए उनमें से प्रत्येक को एक-एक करके 1 घंटे के लिए खोला जाता है | टंकी को भरने में कितने घंटे लगेंगे ?

A

5

B

4

C

6

D

7

Text Solution

Verified by Experts

The correct Answer is:
D
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