Question 967157
The circumference is {{{ 2*pi*r = 2*3.141*8 }}} 
{{{ 2*3.141*8 = 50.2655 }}}
ratio:
{{{ 20 / 50.2655 = x / 360 }}}
{{{ 20*360 = 50.2655x }}}
{{{ 50.2655x = 7200 }}}
{{{ x =143.24 }}}
The minute hand rotates 143.24 degrees