What is inlet and outlet in pipes and cisterns

problems on pipes and cisterns.

An inlet pipe can fill a tank in 2 hours and an outlet pipe can empty a fully filled tank in 3 hours. If the inlet and outlet pipe are opened simultaneously, in what time will the empty tank be filled? कोई आंतरिक पाइप 2 घंटे में किसी टंकी को भर सकता है और बाहरी पाइप 3 घंटे में पूरी भरी हुई टंकी को खली कर सकता है . यदि आंतरिक और बाहरी पाइप को एक साथ खोल दिया जाता है, तो खाली टंकी कितने समय में भर जाएगी?

A cistern can be filled up in 4 h by an inlet A. An outlet B can empty the cistern in 8 h. If both A and B are opened simultaneously, then after how much time will the cistern get filled?

In Regnault's apparatus for measuring specific beat capcity of a solied, there is an intel and an inlet and an outlet in the sterm cahmober .The intel is near the top and the outlet is near the bottom .Why is it better than the opposite choice where the inlet is near bottom and the outlet is near the top ?

In Regnault's apparatus for measuring specific beat capcity of a solied, there is an intel and an inlet and an outlet in the sterm chamber .The intel is near the top and the outlet is near the bottom .Why is it better than the opposite choice where the inlet is near bottom and the outlet is near the top ?

In Regnault's apparatus for measuring specific beat capcity of a solied, there is an intel and an inlet and an outlet in the sterm cahmober .The intel is near the top and the outlet is near the bottom .Why is it better than the opposite choice where the inlet is near bottom and the outlet is near the top ?