A volcano in a continental region erupted and produced a lava flow of volume 20 million cubic metres covering an area of 25 km². Estimate the average thickness of the lava flow in metres.
Answer
0.8 m
The correct answer is 0.8 m — Answer: 0.8 m.
Step-by-step solution
- Convert the area from km² to m²: 25 km² = 25 × (1000 m)² = 25 × 10⁶ m².
- Use the relation thickness = volume ÷ area.
- Thickness = 20 × 10⁶ m³ ÷ 25 × 10⁶ m² = 0.8 m.
- Therefore the average thickness of the lava flow is 0.8 metres.
- Answer: 0.8 m.
Common mistake: Not converting km² to m² before dividing
Concept tested: Volume and area relation in geology
Published · How this solution was prepared and checked
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