If the simple interest on a certain principal amount at 5% per annum for 5 years is Rs. 900 more than the simple interest on the same principal amount for 4 years at 4% per annum, then find the principal amount.

Which movement aimed to promote Khadi, a hand-spun and handwoven cloth native to India?

Who were prominent leaders associated with the initial phase of the Telangana Rebellion (1946-1951) against the Nizam's rule and feudal landlords?

What was the immediate trigger for the Revolt of 1857?