In the hotel courtyard, landscapers are designing a circular garden that will be 60 feet in diameter. They are planning a sidewalk 18 feet from the center of the garden. How long is the sidewalk?

48 feet

Step-by-step explanation:

Radius = 30 feet

Sidewalk is a chord 18 feet away from the centre.

Length of half the side-walk 'x'

30² = 18² + x²

x² = 900 - 324

x² = 576

x = 24 feet

Length of the sidewalk: 2x = 48 feet