Find the number of bricks, each of dimensions 12 cm x 5 cm x 7 cm, required to construct a wall 6 m long, 2.8 m high and 15 cm thick. 

 

 

 The length of a cuboid is one more than its breadth and the perimeter of its base is 18 cm. If its lateral surface area is 54 sq cm, find the volume of the cuboid.

 Find the volume of a cube, if its lateral surface area is 100 sq cm.

 Find the volume of metal required to make a closed box of thickness 1 cm with external measurements 12 cm x 7 cm x 10 cm. 

 A water tank has a capacity to hold 5000 l of water. If the base of the tank has dimensions 5 m x 2 m find its height.