A rectangular box measures internally 1.6 m long, 1 m broad and 60 cm deep. The number of cubical block each of edge 20 cm that can be packed inside the box is:

A smaller circle touches a bigger circle internally and also passes through the center 'O' of the bigger circle. If the area of the smaller circle is 192 $${cm^2}$$, the area of the bigger circle (in $${cm^2}$$) is:

If the diagonals of a rhombus are 24cm and 10cm, then the perimeter of the rhombus is ___________.

The diameters of two cones are equal. If their slant heights are in the ratio 5: 2, then the ratio of curved surface areas of the cones is _________ .

The length, the breadth, and the height of a cuboid are 40 cm, 20 cm and 10 cm. respectively. What is the volume of this cuboid?

The length and the breadth of a rectangle are 12 cm and 6 cm, respectively. What is the area of the rectangle?

If the areas of two similar triangles are in the ratio 196 : 625,what would be the ratio of the corresponding sides? 

The breadth ‘b’ of a room is twice its height and half of its length. Find the length of the longest diagonal of the room.