The height of a light house is 20 meters above sea level. The angle of depression (from the top of the lighthouse) of a ship in the sea is 30°. What is the distance of the ship from the foot of the light house?

Ramesh deposited ₹ 15600 in a fixed deposit at the rate of 10 % per annum simple interest. After every second year, he adds his interest earnings to the principal. The interest at the end of fourth year is 

Sharikh got 32% discount on the marked price of a car and paid Rs. 153000 for the car. If the discount be 5%, what will be the, cost of car ? 

The average age of three boys is 18 years and their age ratio is 2: 3: 4, then what is the age of the youngest boy?

A loss of 19% gets converted into a profit of 17% when the selling price is increased by Rs. 162. The cost price of the article is