Question 953650
Her rate is:
{{{ 24/1 }}} mi/hr
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Note that {{{ 20 }}} min = {{{ 1/3 }}} hr
You could set up a ratio:
{{{ 24/1 = d/(( 1/3 )) }}}
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Multiply top and bottom of the right side by {{{ 3 }}}
{{{ 24/1 = 3d }}}
Divide both sides by {{{ 3 }}}
{{{ d = 8 }}}
She could drive 8 miles in 20 min
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check:
In 3 times that amount of time, she
could drive 3 times as far, so
In 60 min she could drive 24 miles
or, 24 mi/hr
OK