If 1 litre of water weighs 1 kg, then how many cubic millimetres of water will weigh 0.1 gm?

Answer: (c) 100

1 litre = 1 kg means 1 gram of water occupies 1 cm³. Since 1 cm³ = 10 × 10 × 10 = 1000 mm³, 0·1 g occupies 100 mm³.

1. 1 litre = 1000 cm³ weighs 1 kg = 1000 g, so 1 g of water = 1 cm³.
2. 1 cm³ = 10 mm × 10 mm × 10 mm = 1000 mm³.
3. 0·1 g = 0·1 cm³ = 100 mm³.

Remember · Water: 1 g = 1 cm³ = 1 mL; and 1 cm³ = 1000 mm³.

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