Compute the average speed in m/s of a runner who completes a mile in 4.00min
i got 0.0041667
is that correct and if not can someone correct me with proven work

             (1 mile / 4 min) x (1,609.344 meters/ 1 mile) x (1 min / 60 sec)

         = (1 x 1,609.344 x 1) / (4 x 1 x 60)  m/s

         =          6.7056 m/s  .



       (0.0041667 meter/sec) x (1 mile / 1,609.344 meters) x (60 sec / min)

   =  (0.0041667 x 1 x 60)  /  (1 x 1,609.344 x 1)  mile/min

   =    0.0001553... mile per minute

   =    0.0006214... mile in 4 minutes


1 mile per hour  =  about  0.447 meter per second

1 meter per second  =  about 2.237 miles per hour