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
Calculate the economic profit for a firm if it's total revenues are Rs. 35 crores, explicit costs are Rs. 7 crores, and implicit costs are Rs. 10 crores.