Algebra: Maths KS3
In lessons three and four, use algebra to calculate how fast a Tunnel Boring Machine (TBM) can bore through the ground, and use percentages and ratios to explore how rainfall across London drains into four Combined Sewer Overflows (CSOs).
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Maths KS3 Lesson 3: Algebra
Screen 2: The tunnel needs to pass through soils made of clay, sand and chalk. The TBM’s progress will vary depending on each soil’s hardness, stability and the ease with which the spoil (waste soil) can be removed.
Screen 3: The TBM can travel a distance d in each shift. How can you create a formula for d that takes into account the maximum speed of the TBM, the length of the shift, any stoppage time, and the different speed through sand, clay or chalk soils?