The length of a hall is 18m and the width 12m. The sum of the areas of the floor and the flat roof is equal to the sum of the areas of the four walls. Find the height of the hall.

The length of a hall is 20m and width 16m . The sum of the areas of the floor and the flat roof is equal to the sum of the areas of the four walls. Find the height and the volume of the hall.

The length of a hall is 20\ m and width 16\ mdot The sum of the area of the floor and the flat roof is equal to the sum of the areas of the four walls. Find the height and the volume of the hall.

The length of a hall is 20\ m and width 16\ mdot The sum of the area of the floor and the flat roof is equal to the sum of the areas of the four walls. Find the height and the volume of the hall.

The length of a hall is 5 m more than its breadth. If the area of the floor of the hall is 84 m^2 , what are the length and breadth of the hall?

The perimeter of a floor of a room is 30m and its height is 3m. Find the area of four walls of the room.

The radius of one circular field is 20 m and that of another is 48 m. Find the radius of the third circular field whose area is equal to the sum of the areas of two fields.

The height of a right circular cylinder is 10.5 m. Three times the sum of the area of its two circular faces is twice the area of the curved surface. Find the volume of the cylinder.

The height of a right circular cylinder is 10.5 m. Three times the sum of the area of its two circular faces is twice the area of the curved surface. Find the volume of the cylinder.

The length of a hall is 18 m and its width is 13.5 m. Find the least number of square tiles, each of side 25 cm, required to cover the floor of the hall, (i) without leaving any margin. (ii) leaving a margin of width 1.5 m all around. In each case, find the cost of the tiles required at the rate of Rs. 6 per tile.

The diameters of two given circles are in the ratio 3 : 4 and the sum of the areas of the circles is equal to the area of a circle whose diameter measures 30m. Find the diameter of the given circles.