A child drinks 250 ml of milk and eats 3 biscuits each weighing 20 grams. If the density of a biscuit is 0.5 g/ml, what is the total volume of food and drink the child consumes in milliliters? (Use the conversion: volume = mass ÷ density).
Answer
370 ml
The correct answer is 370 ml — Therefore the child consumes 370 ml in total.
Step-by-step solution
- Determine the total mass of biscuits: 3 × 20 g = 60 g.
- Convert biscuit mass to volume using density: 60 g ÷ 0.5 g/ml = 120 ml.
- Add the volume of milk: 250 ml + 120 ml = 370 ml.
- Therefore the child consumes 370 ml in total.
Common mistake: Skipping the conversion step or using the wrong density value
Concept tested: Converting mass to volume using density
Published · How this solution was prepared and checked
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