Radius: r=18 feet Cental Angle: A=44° Each cycle (one back and forth) lasts 12 seconds In each cycle the pendulum swings: L=(A/360°) 2 pi r L=(44°/360°)(2)(3.141592654)(18 feet) L=(0.122222222)(113.0973355 feet) L=13.82300764 feet Rounded to 3 decimal places: L=13.823 feet
Each minute (60 seconds) the pendulum makes: Number of cycles: n=(60 seconds) / (12 seconds)→n=5 cycles
Then, each minute, the pendulum swings: T=nL=5(13.823 feet)→T=69.115 feet
Answer: Each minute, the pendulum swings 69.115 feet.