Find the longest pole length that can be put in a room of 10 m x 10 m x 5 m dimensions.

2 A 3 cm thick iron open box is made whose external dimensions are 78 cm x 54 cm x 12 cm. Find the weight of the box if its density is 60 gm/cm³. 3 Find the surface area of a cube whose volume is given:
(i) 216 cm³    (ii) 1000 cm³ 4 Two equal cubes with sides 6 cm are placed one above the other, forming a cuboid. Find the total surface area of the cuboid thus formed. 5 Two cubes each of volume 64 cm³ are joined end-to-end. Find the total surface area of the resulting cuboid.