Answer
$34.09\ mph$
Work Step by Step
$ Distance$
$ 1\ mile=5280 ft $
$1\ yard = 3 ft$
$1\ ft= 12 in$
$Time$
$1\ hour= 60 min$
$1\ minute= 60 sec$
We use unit conversions to find:
$\frac{50 ft}{1 sec}\times\frac{1 mi.}{5280 ft}\times\frac{60 sec}{1 min}\times\frac{60 min}{1 hr}=\frac{180,000 mi}{5280 hr}\approx \ 34.09 mph$
