A solid rectangular piece of iron measures 6 m by 6 cm by 2 cm. Find the weight of this piece, if 1 cm³ of iron weighs 8 gm.

An 8 m long cuboidal beam of wood when sliced produces four thousand 1 cm cubes and there is no wastage of wood in this process. If one edge of the beam is 0.5 m, find the third edge.

The dimensions of a metal block are 2.25 m by 1.5 m by 27 cm. It is melted and recast into cubes, each of the side 45 cm. How many cubes are formed?

Fill in the blanks in each of the following so as to make the statement true :

(i) 1 m³= ……….. cm³

(ii) 1 litre = …….cubic decimetre

(iii) 1 kl = ………… m³

(iv) The volume of a cube of side 8 cm is …….

(v) The volume of a wooden cuboid of length 10 cm and breadth 8 cm is 4000 cm³. The height of the cuboid is …50…. cm.

(vi) 1 cu. Dm = …….. cu. Mm

(vii) 1 cu. Km = ……… cu. M

(viii) 1 litre = ......cu. Cm

(ix) 1 ml = ……. Cu. Cm

(x) 1 kl = …… cu. Dm = ……….. cu. Cm.

Find the surface area of a cuboid whose

(i) length = 10 cm, breadth = 12 cm, height = 14 cm

(ii) length = 6 dm, breadth = 8 dm, height = 10 dm

(iii) length = 2m, breadth = 4 m, height = 5 m

(iv) length = 3.2 m, breadth = 30 dm, height = 250 cm.