जलीय माध्य गहराई (Hydraulic mean depth या hydraulic radius) को गणितीय रूप से किसके अनुपात के रूप में परिभाषित किया जाता है?

The Dandi March, also known as the Salt Satyagraha, was led by which influential leader?

Which act formally granted independence to India, marking the end of British rule?

Who was the key figure in establishing the Indian National Congress?