Question

1 cubic cm of metal used in the box weights 0.5gms

Answer 1

Sol: Outer dimensions of the box = 50 cm, 40 cm and 23 cm Outer volume of the box = 50 × 40 × 23 = 46000 cu cm Inner dimensions of the box: Length = (50 - 2×3) = 44 cm Breadth = (40 - 2×3) = 34 cm Height = (23 - 30 = 20 cm Inner volume of the box = 44 × 34 × 20 = 29920 cu cm Volume of the wood = Outer Volume - Inner Volume = 46000 - 29920 = 16080 cu cm Weight of the wood per cu cm = 0.5 g Weight of the wood used for making the box = 16080 × 0.5 = 8040 g = 8.04 kg