Precalculus homework help?
A ferris wheel is a circle with diameter 140 feet which sits on a 6-foot-tall platform making its overall height 146 feet. It completes two revolutions in 2 minutes and 57 seconds. Assuming the riders are at the edge of the circle, how fast are they traveling in miles per hour?
- DWReadLv 74 years ago
circumference = 140π ft
2 rev × (140π ft)/rev = 280π ft
passengers travel 280π ft every two revolutions
2 minutes and 57 seconds = 177 seconds
(280π ft)/(177 seconds) × (1 mile)/(5280 ft) × (3600 seconds)/hour ≅ (3.388 miles)/hour