The document appears to be a BTEC assignment brief for "Further Mathematics in Construction." It includes multiple mathematical problems related to construction engineering, requiring algebraic and trigonometric techniques. Here’s a breakdown of the key tasks:

Tasks Overview:

1. Task 1a: Solve construction-related problems:

   • Calculate the perimeter and area of a site based on a given shape.
   • Determine the volume of soil for a ditch with specified dimensions.
   • Calculate the height of a mobile phone mast using trigonometry.

2. Task 1b: Beam design problems:

   • Find the centroidal axes for given sections (I Section and Unequal Angle).
   • Identify the neutral axis on diagrams.
   • Calculate the moment of inertia and section modulus.

3. Task 1c: Beam deflection:

   • Use the given formula to calculate the percentage change in deflection when the span increases by 2.5%.

4. Task 1d: Noise level calculation:

   • Calculate the maximum allowable SPL for a new machine given existing SPL data.

5. Evidence:

   • Provide a detailed report with clear calculations, supported by diagrams where necessary.

Would you like assistance with solving specific tasks or guidance on how to approach these problems?