Question 942209
This is a ratio:
distance [1] / time [1] = distance[2] / time[2]
{{{ ( 1/5) / 1 = 2 / t }}}
Multiply both sides by {{{ 5t }}}
{{{ t = 10 }}} hrs
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You could draw rectangles with heights 
{{{ 1/5 }}} and {{{ 2 }}} to show miles
and
rectangles with heights {{{ 1 }}} and
{{{ 10 }}}  to show times ( on a different scale )