The area between the isohyets 0.45 m and 0.55 m is 100 km2 and between 0.55 m and 0.65 m is 150 km2. Find the average depth of annual precipitation over the entire basin area of 250 km2.

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?