A hall is 15 m long and 12 m broaIf the sum of the areas of the floor and the ceiling is equal to the sum of the areas of four walls, the volume of the hall is?
Present ages of Sameer and Anand are in the ratio of 5: 4 respectively. Three years hence, the ratio of their ages will become 11: 9 respectively. What is Anand�s present age in years?