Question 1107729
The circumference of the tire is  {{{ 33*pi = 103.672558 }}} inches, which is about 8.63938ft

The speed of 15mi/hr is  equivalent to  15mi/hr * 1hr/3600sec * 5280ft/mi = 22 ft/sec

Thus the time for one revolution is   8.63938ft/(22 ft/sec) = {{{ highlight(0.3927s) }}}    to 4 decimal places