Question 984052
You would like to know how many miles
you travel in {{{ 60 }}} min, since that 
would be miles / hour
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Rate = {{{ 12/50 }}} mi/min
Divide top and bottom of the rate by {{{ 50 }}}
{{{ (( 12/50 )) / (( 50/50 )) = (( 12/50 ))/1 }}} miles / min
{{{ (( 6/25 )) / 1 }}} miles / min
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Convert {{{ 2 }}} hrs to minutes:
[ hrs ] x [ min / hr ] 
{{{ 2*( 60/1 ) = 120 }}} min
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Now use {{{ d = r*t }}}
{{{ d = (( 6/25 ) / 1 )*120 }}}
{{{ d = 720/25 }}}
{{{ d = 28.8 }}}
You travel 28.8 mi in 2 hrs
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check:
{{{ d = r*t }}}
[ mi ] = [ mi/min ]*[ min ] 
{{{ 28.8 = ( 12/50 )*120 }}}
{{{ 28.8 = 28.8 }}}