SOLUTION: Ethan runs around the perimeter of a circular track at 10 ft/sec. The track has a radius of 90 yd. After 15 seconds, Ethan turns and runs to the center of the track along a straigh

Question 1106106: Ethan runs around the perimeter of a circular track at 10 ft/sec. The track has a radius of 90 yd. After 15 seconds, Ethan turns and runs to the center of the track along a straight (radial) line. Upon reaching the center, he turns and runs away along a different radial line to his starting position on the perimeter.
(a) How far has Ethan traveled once he has returned to his starting position? (ft)
(b) How much time will it take for Ethan to complete his circuit? (second)
(c) Find the area of the pie-shaped sector enclosed by path. (sq-yd)

Answer by addingup(3677) (Show Source): You can put this solution on YOUR website!

150 (10*15)
270 (90*3)
270 (90*3)
(a): 150+270+270 = your answer
(b): answer from a divided by 10 = total seconds

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