Three inlet pipes A, B, &C fill a tank in 10, 20, and 30 Hr. If All Pipes are open together after 4 hours closed pipe A. Then after 2 hours closed the pipe B. The Rest work will be done by C. Then after how many hours tank will be filled.

Three inlet pipes A, B, &C fill a tank in 10, 20, and 30 Hr. If All Pipes are open together after 4 hours closed pipe A. Then after 2 hours closed the pipe B. The Rest work will be done by C. Then after how many hours tank will be filled.

TYPE IVThree inlet pipes A, B, &C fill a tank in 10, 20, and 30 Hr. If All Pipes are open together after 4 hours closed pipe A. Then after 2 hours closed the pipe B. The Rest work will be done by C. Then after how many hours tank will be filled.

Answer:

https://youtu.be/DC9JDl27h88