What % of a day is 30 minutes

A shopkeeper sells rice at 10% profit and uses weight 30% less than the actual measure. His gain percent is

Last year Mr. A bought two paintings. This year he sold them for Rs. 20000 each. On one, he made a 25% profit and on the other he had a 25% loss.

Due to 25% fall in the rate of eggs, one can buy 2 dozen eggs more than before by investing Rs. 162. Then the orignal rate per dozen of the eggs is

4% of the selling price of an article is equal to 5% of its cost price. Again 20% of the selling price is Rs. 120 more than 22% of its cost price. The ratio of cost price & selling price is

A & B jointly made a profit of Rs. 1650 and they decided to share it such that 1/3 of A's profit is equal to 2/5 of B's profit. Then profit of B is