Question 737792
d=r*t  can also be written as t=d/r 

So we have {{{t = (200ft)/(3 miles per hour)}}}

But the units don't match! 

So we need to convert feet into miles.

Using the conversion equation 1 mile=5280 feet, selecting the one with feet in the denominator so that feet will cancel:

{{{1=(1mi)/(5280ft)=(5280ft)/(1mi)}}}

{{{200ft/3mph=(200ft/3mph)*((1mi)/(5280ft))=(200hr)/(5280)=(5hr/132)=(5hr/132)*(60minutes/1hour)=(25/33)minutes=(25/33)*(60seconds/1minute)=45.45seconds}}}