A clay layer 10 m thick in the field takes 400 days to attain 50% consolidation under the condition of double drainage. If the same clay layer is underlain by a hard rock (single drainage condition), what is the time taken to attain 50% consolidation?

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?