Question 1012427
[ distance ] = [ rate ] x [ time ]
You can convert all the times to minutes
or you can convert them to hours
I'll convert to hours
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[ minutes ] x [ hrs / min ] = [ hrs ]
{{{ 15*( 1/60 ) = 1/4 }}} hrs
and
{{{ 20*( 1/60 ) = 1/3 }}} hrs
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Sean's rate walking is:
{{{ ((3/4)) / ((1/4)) = (3/4)*4 }}}
{{{ (3/4)*4 = 3 }}} mi/hr
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[ distance ] = [ rate ] x [ time ]
{{{ d = r*t }}}
{{{ d = 3*( 1 + 1/3 ) }}}
{{{ d = 3*( 4/3 ) }}}
{{{ d = 4 }}} mi
He can walk 4 mi in 1 hr and 20 min