the number of revolutions made by a bicycle wheel of 28-inch diameter in traveling 1/2 mile is closest to:
A) 720
B) 180
C) 360
D) 120

Question

the number of revolutions made by a bicycle wheel of 28-inch diameter in traveling 1/2 mile is closest to:
A) 720                                                        
B) 180                                                              
C) 360                                    
D) 120

anonymous · Answer

C.

Circumference= 2 x Pi x Radius
Or 2x 3.14x 14 = 87.964594 inches per complete revolution

A half mile is 31680 inches
 31680/87.964594= 360.144

Therefore 360 revolutions of a 28 inch wheel will be closest to a half mile