A hexagonal vat of base area 144 cm2 is filled with oil up to a height of 60 cm. A solid cube whose total surface area is 864 cm2 is completely immersed in the vat, then what is the per cent increase in the level of oil in the vat?

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?