Question 708939
If the car traveled 30 mi at 20 mi/hr,
{{{ d = r*t }}}
{{{ 30 = 20*t }}}
{{{ t = 3/2 }}} hrs
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{{{ 240 - 30 = 210 }}} mi
{{{ d = r*t }}}
{{{ 210 = 60*t }}}
{{{ t = 21/6 }}}
{{{ t = 7/2 }}} hrs
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The total time is
{{{ 3/2 + 7/2 = 10/2 }}}
{{{ 10/2 = 5 }}}
The 240 mile trip took 5 hrs