What is the area of an annulus with an inner diameter of 2.74 ext m and an outer diameter of 7.52 ext m?

Here are the solutions to the remaining questions:

Q5. What is the area of an annulus with an inner diameter of $2.74 \text{ m}$ and an outer diameter of $7.52 \text{ m}$?

Step 1: Calculate the inner and outer radii.
Inner diameter $d_1 = 2.74 \text{ m}$, so inner radius $r = \frac{2.74 \text{ m}}{2} = 1.37 \text{ m}$.
Outer diameter $d_2 = 7.52 \text{ m}$, so outer radius $R = \frac{7.52 \text{ m}}{2} = 3.76 \text{ m}$.