Question 1031672
Let {{{ d }}} = the distance the driver travels after
passing the mile marker when officer catches driver
The officer must travel {{{ d + 1/4 }}} mi to
catch driver
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officer's speed is:
{{{ 70 = d/(1/12) }}}
{{{ d = 70/12 }}} mi
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{{{ d + 1/4 = 70/12 + 3/12 }}}
{{{ d + 1/4 = 73/12 }}}
{{{ 73/12 = 70*t }}}
{{{ t = 73/840 }}} hrs
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Let the driver's speed = {{{ s }}}
The driver traveled {{{ 70/12 }}} mi in
{{{ 73/840 }}} hrs
{{{ 70/12 = s*( 73/840 ) }}}
{{{ s = ( 840/73 )*( 70/12 ) }}}
{{{ s = 67.123}}}
The driver's speed was 67.123 mi/hr
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check my math and ( preferably ) get
another opinion, too.