The angle of elevation of the top of a pillar from the foot and the top of a building 20 m high, are 60° and 30° respectively. The height of the pillar is
A shop keeper earns a profit of 12% on selling a book at 10% discount on the printed price. The ratio of cost price to the printed price of the book is
Name the former world silver medallist representing Manipur who claimed gold in the 48 kg category at the 2018 Natic Women's Boxing Championships in Rohtak.