The circumference of a circular stage is 157 feet. If Chris paints the stage at a rate of 400 square feet per hour, how long would it take to the nearest hour, for Chris to paint the entire stage?

Answer 1

let the radius be r ft
2πr = 157
r = 157/(2π) = 24.987.. ft

area = πr^2 = 1961.5 ft^2

time = 1961.5/400 = appr 4.9 hours