Question 811128
{{{ d = r*t }}}
( miles ) = ( miles / hr ) x ( hrs )
------------
{{{ 39 }}} min = {{{ 39/60 }}} hrs
{{{ 112 = r*( 3 + 39/60 ) }}}
{{{ 112 = r*( 3 + 13/20 ) }}}
{{{ 112 = r*( 3.65 ) }}}
{{{ r = 112 / 3.65 }}}
{{{ r = 30.685 }}}
The average speed is 30.685 mi/hr