Two pipes can fill a tank in 729 minutes and 1215 minutes respectively. There is also a leakage pipe in the tank. When all three pipes are opened together, the empty tank is filled in 486 minutes. How many minutes will the leakage pipe alone take to completely empty the filled tank?

Which Indian independence movement leader was primarily known for his philosophy and practice of non-violent civil disobedience?

Who gave the call for 'Do or Die' during the Quit India Movement in 1942?

Which of the following revolutionary pairs were imprisoned together in Cellular Jail and faced harsh conditions, contributing significantly to the Indian independence movement?