It takes 5 hours to fill a container using machine A. The same container can be filled using machine B in 10 hours. When the container is full, Machine C can fully empty the container in 20 hours. If all three machines start working on the same empty container how long will it take for the container to be conpletely filled___

Created 1 year ago | Updated 5 days ago
(ক) 1 hours
(খ) 4 hours
(গ) 2 hours
(ঘ) 15 hours
No explanation available.

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