Question

WORKS
8 A luxury mansion has a semicircular stencilled concrete drive that is 3.0 m wide. The inside radius is 17.0 m
and the outside radius is 20.0 m. How many metres of edge board would be required to form the drive?

Answer 1

Considering the circumference of the circles, it is found that 18.9 metres of edge board would be required to form the drive.

What is the circumference of a circle?

The circumference of a circle of radius r is given by:

$C = 2\pi r$

In this problem, considering that the outside radius is 20.0 m and the inside radius if of 17.0 m, the drive has a radius of r = 3 m, hence:

$C = 2\pi r$

$C = 2\pi \times 3$

$C = 6\pi$

$C = 18.9$

18.9 metres of edge board would be required to form the drive.

More can be learned about the circumference of a circle at https://brainly.com/question/25846963