Question

the empty
Two pipes can separately fill a cistern in 20 min and 30 min respectively. When the
waste pipe is open, the two pipes can together fill the cistern in 1 h. Find the time
taken by the waste pipe to empty a full cistern.​

Answer 1

Answer:

Chapter - Atoms and Molecules

Question :-

Write down the formula with proper equation :-

☆ Magnesium Hydroxide