'A' and 'B' started a business by investing ₹(x + 3000) and ₹(x - 1000) respectively, such that the total sum invested by 'A' and 'B' together is ₹14,000. If 'A' invested his sum for 4 months less than 'B' and the ratio of profit shares of 'A' and 'B' is 9:7, find the time period (in months) for which 'A' invested his sum.

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?